https://martenweave.github.io/blog/ Practical notes on SAP migration, MDM, data governance, lineage, impact, and deterministic validation. en Wed, 15 Jul 2026 00:00:00 GMT https://martenweave.github.io/blog/sap-mdg-implementation-knowledge.html https://martenweave.github.io/blog/sap-mdg-implementation-knowledge.html Tue, 14 Jul 2026 00:00:00 GMT SAP MDG and MDM SAP Master Data Governance can manage governed records, change requests, workflows, data quality rules and the operational lifecycle of master data. https://martenweave.github.io/blog/sap-migration-mapping-spreadsheets.html https://martenweave.github.io/blog/sap-migration-mapping-spreadsheets.html Tue, 14 Jul 2026 00:00:00 GMT Migration readiness Most SAP migration programmes begin with a mapping spreadsheet. https://martenweave.github.io/blog/what-to-prepare-before-starting-an-sap-mdg-implementation.html https://martenweave.github.io/blog/what-to-prepare-before-starting-an-sap-mdg-implementation.html Tue, 14 Jul 2026 00:00:00 GMT SAP MDG and MDM An SAP MDG implementation often appears to begin with the platform. https://martenweave.github.io/blog/how-sap-data-migration-and-mdg-implementation-should-work-together.html https://martenweave.github.io/blog/how-sap-data-migration-and-mdg-implementation-should-work-together.html Tue, 14 Jul 2026 00:00:00 GMT SAP MDG and MDM SAP data migration and SAP Master Data Governance are often organised as separate workstreams. https://martenweave.github.io/blog/why-an-sap-mdg-implementation-needs-an-independent-model-specification.html https://martenweave.github.io/blog/why-an-sap-mdg-implementation-needs-an-independent-model-specification.html Tue, 14 Jul 2026 00:00:00 GMT SAP MDG and MDM An SAP MDG implementation contains several versions of the model. https://martenweave.github.io/blog/sap-data-migration-readiness-checklist.html https://martenweave.github.io/blog/sap-data-migration-readiness-checklist.html Tue, 14 Jul 2026 00:00:00 GMT Migration readiness A migration team can complete mappings, build load files and pass several technical checks while the domain is still not ready for migration. https://martenweave.github.io/blog/why-mapping-completion-is-not-migration-readiness.html https://martenweave.github.io/blog/why-mapping-completion-is-not-migration-readiness.html Tue, 14 Jul 2026 00:00:00 GMT Migration readiness A migration programme reports that 96% of mappings are complete. https://martenweave.github.io/blog/how-to-build-a-single-source-of-truth-for-sap-mappings.html https://martenweave.github.io/blog/how-to-build-a-single-source-of-truth-for-sap-mappings.html Tue, 14 Jul 2026 00:00:00 GMT Migration readiness Most SAP programmes claim to have a single source of truth for mappings. https://martenweave.github.io/blog/detect-dataset-gaps-before-sap-migration-testing.html https://martenweave.github.io/blog/detect-dataset-gaps-before-sap-migration-testing.html Tue, 14 Jul 2026 00:00:00 GMT Validation and readiness Many SAP migration programmes treat testing as the first serious encounter between the target model and the source data. https://martenweave.github.io/blog/impact-analysis-sap-field-change.html https://martenweave.github.io/blog/impact-analysis-sap-field-change.html Tue, 14 Jul 2026 00:00:00 GMT Lineage and impact On Monday, a country team asks for one SAP field to become mandatory. https://martenweave.github.io/blog/trace-legacy-field-to-sap-target.html https://martenweave.github.io/blog/trace-legacy-field-to-sap-target.html Tue, 14 Jul 2026 00:00:00 GMT Lineage and impact A defect appears during the second mock load. https://martenweave.github.io/blog/how-to-keep-sap-mdg-design-and-configuration-aligned.html https://martenweave.github.io/blog/how-to-keep-sap-mdg-design-and-configuration-aligned.html Tue, 14 Jul 2026 00:00:00 GMT SAP MDG and MDM The design document says the field is optional. https://martenweave.github.io/blog/how-to-reduce-rework-during-an-sap-mdg-implementation.html https://martenweave.github.io/blog/how-to-reduce-rework-during-an-sap-mdg-implementation.html Tue, 14 Jul 2026 00:00:00 GMT SAP MDG and MDM The programme has already approved the model. https://martenweave.github.io/blog/what-an-sap-mdg-handover-package-should-contain.html https://martenweave.github.io/blog/what-an-sap-mdg-handover-package-should-contain.html Tue, 14 Jul 2026 00:00:00 GMT SAP MDG and MDM The SAP MDG programme goes live on Friday. https://martenweave.github.io/blog/why-project-knowledge-disappears-after-go-live.html https://martenweave.github.io/blog/why-project-knowledge-disappears-after-go-live.html Tue, 14 Jul 2026 00:00:00 GMT Model governance Six months after go-live, an SAP MDG validation starts rejecting supplier changes. https://martenweave.github.io/blog/how-martenweave-complements-sap-mdg.html https://martenweave.github.io/blog/how-martenweave-complements-sap-mdg.html Tue, 14 Jul 2026 00:00:00 GMT SAP MDG and MDM A company has already invested in SAP Master Data Governance. https://martenweave.github.io/blog/martenweave-vs-excel-jira-and-confluence.html https://martenweave.github.io/blog/martenweave-vs-excel-jira-and-confluence.html Tue, 14 Jul 2026 00:00:00 GMT Model governance The programme already has an approved toolset. https://martenweave.github.io/blog/data-model-registry-vs-mdm-platform.html https://martenweave.github.io/blog/data-model-registry-vs-mdm-platform.html Tue, 14 Jul 2026 00:00:00 GMT Model governance A company has a data problem. https://martenweave.github.io/blog/data-model-registry-vs-data-catalog.html https://martenweave.github.io/blog/data-model-registry-vs-data-catalog.html Tue, 14 Jul 2026 00:00:00 GMT Model governance A migration manager searches the enterprise data catalogue for a customer field. https://martenweave.github.io/blog/why-ai-should-propose-model-changes-but-never-apply-them-directly.html https://martenweave.github.io/blog/why-ai-should-propose-model-changes-but-never-apply-them-directly.html Tue, 14 Jul 2026 00:00:00 GMT AI governance An AI agent reviews a migration workbook and finds an obvious inconsistency. https://martenweave.github.io/blog/deterministic-validation-migration-risk.html https://martenweave.github.io/blog/deterministic-validation-migration-risk.html Tue, 14 Jul 2026 00:00:00 GMT Validation and readiness The migration workbook looks complete. https://martenweave.github.io/blog/how-to-manage-global-and-local-requirements-in-sap-mdg.html https://martenweave.github.io/blog/how-to-manage-global-and-local-requirements-in-sap-mdg.html Tue, 14 Jul 2026 00:00:00 GMT SAP MDG and MDM The global template says the field is mandatory. https://martenweave.github.io/blog/how-to-track-sap-mdg-model-decisions.html https://martenweave.github.io/blog/how-to-track-sap-mdg-model-decisions.html Tue, 14 Jul 2026 00:00:00 GMT SAP MDG and MDM During a design workshop, the programme agrees that a supplier classification should be mandatory. https://martenweave.github.io/blog/how-to-validate-that-sap-mdg-configuration-matches-the-approved-model.html https://martenweave.github.io/blog/how-to-validate-that-sap-mdg-configuration-matches-the-approved-model.html Tue, 14 Jul 2026 00:00:00 GMT SAP MDG and MDM The design review is complete. https://martenweave.github.io/blog/evidence-based-migration-readiness-report.html https://martenweave.github.io/blog/evidence-based-migration-readiness-report.html Tue, 14 Jul 2026 00:00:00 GMT Migration readiness The steering committee sees a green dashboard. https://martenweave.github.io/blog/how-better-model-traceability-reduces-rework.html https://martenweave.github.io/blog/how-better-model-traceability-reduces-rework.html Tue, 14 Jul 2026 00:00:00 GMT Lineage and impact A migration defect appears during UAT. https://martenweave.github.io/blog/how-to-reduce-key-person-risk-in-sap-programmes.html https://martenweave.github.io/blog/how-to-reduce-key-person-risk-in-sap-programmes.html Tue, 14 Jul 2026 00:00:00 GMT Model governance The programme has one person who knows how everything fits together. https://martenweave.github.io/blog/how-much-of-an-mdg-programme-happens-outside-the-mdg-platform.html https://martenweave.github.io/blog/how-much-of-an-mdg-programme-happens-outside-the-mdg-platform.html Tue, 14 Jul 2026 00:00:00 GMT SAP MDG and MDM The programme has selected SAP Master Data Governance. https://martenweave.github.io/blog/how-a-small-martenweave-pilot-can-de-risk-a-large-mdg-investment.html https://martenweave.github.io/blog/how-a-small-martenweave-pilot-can-de-risk-a-large-mdg-investment.html Tue, 14 Jul 2026 00:00:00 GMT SAP MDG and MDM The organisation is preparing a major SAP Master Data Governance programme. https://martenweave.github.io/blog/how-metalhatscats-helps-teams-establish-model-governance.html https://martenweave.github.io/blog/how-metalhatscats-helps-teams-establish-model-governance.html Tue, 14 Jul 2026 00:00:00 GMT AMS and continuity A programme has already created most of the artefacts it needs. https://martenweave.github.io/blog/how-to-turn-model-governance-into-an-ams-capability-after-go-live.html https://martenweave.github.io/blog/how-to-turn-model-governance-into-an-ams-capability-after-go-live.html Tue, 14 Jul 2026 00:00:00 GMT AMS and continuity The implementation programme has ended. https://martenweave.github.io/blog/how-to-use-github-as-a-change-control-layer-for-sap-data-models.html https://martenweave.github.io/blog/how-to-use-github-as-a-change-control-layer-for-sap-data-models.html Tue, 14 Jul 2026 00:00:00 GMT Model governance A country team changes one row in a mapping workbook. https://martenweave.github.io/blog/how-to-govern-spreadsheet-changes-without-forcing-business-users-into.html https://martenweave.github.io/blog/how-to-govern-spreadsheet-changes-without-forcing-business-users-into.html Tue, 14 Jul 2026 00:00:00 GMT Model governance The business owner receives a mapping workbook. https://martenweave.github.io/blog/how-to-design-a-model-change-request-that-business-and-technical-teams.html https://martenweave.github.io/blog/how-to-design-a-model-change-request-that-business-and-technical-teams.html Tue, 14 Jul 2026 00:00:00 GMT AMS and continuity A business owner requests a change: https://martenweave.github.io/blog/how-to-prioritise-model-changes-by-business-risk-instead-of-ticket.html https://martenweave.github.io/blog/how-to-prioritise-model-changes-by-business-risk-instead-of-ticket.html Tue, 14 Jul 2026 00:00:00 GMT Model governance A senior stakeholder opens a ticket: https://martenweave.github.io/blog/how-to-build-a-model-risk-register-for-sap-migration-and-mdg.html https://martenweave.github.io/blog/how-to-build-a-model-risk-register-for-sap-migration-and-mdg.html Tue, 14 Jul 2026 00:00:00 GMT SAP MDG and MDM The programme risk register looks healthy. https://martenweave.github.io/blog/how-to-turn-model-risks-into-an-actionable-sap-migration-backlog.html https://martenweave.github.io/blog/how-to-turn-model-risks-into-an-actionable-sap-migration-backlog.html Tue, 14 Jul 2026 00:00:00 GMT Migration readiness The migration programme has identified a serious risk: https://martenweave.github.io/blog/how-to-define-exit-criteria-for-sap-migration-model-risks.html https://martenweave.github.io/blog/how-to-define-exit-criteria-for-sap-migration-model-risks.html Tue, 14 Jul 2026 00:00:00 GMT Migration readiness The programme has completed the remediation task. https://martenweave.github.io/blog/how-to-prove-that-an-sap-migration-risk-is-really-closed.html https://martenweave.github.io/blog/how-to-prove-that-an-sap-migration-risk-is-really-closed.html Tue, 14 Jul 2026 00:00:00 GMT Migration readiness The steering committee asks whether a critical migration risk has been closed. https://martenweave.github.io/blog/how-to-design-a-closure-evidence-workspace-for-sap-migration-and-mdg.html https://martenweave.github.io/blog/how-to-design-a-closure-evidence-workspace-for-sap-migration-and-mdg.html Tue, 14 Jul 2026 00:00:00 GMT SAP MDG and MDM The programme is preparing for a risk-closure meeting. https://martenweave.github.io/blog/how-to-connect-martenweaves-ui-to-live-model-dataset-and-proposal-data.html https://martenweave.github.io/blog/how-to-connect-martenweaves-ui-to-live-model-dataset-and-proposal-data.html Tue, 14 Jul 2026 00:00:00 GMT Model governance A migration architect opens Martenweave and searches for Customer Group . https://martenweave.github.io/blog/how-to-investigate-an-sap-data-model-problem-before-changing-the-system.html https://martenweave.github.io/blog/how-to-investigate-an-sap-data-model-problem-before-changing-the-system.html Tue, 14 Jul 2026 00:00:00 GMT Model governance A migration test fails because Customer Group is missing. https://martenweave.github.io/blog/how-to-structure-a-model-investigation-case-so-the-finding-can-be-reused.html https://martenweave.github.io/blog/how-to-structure-a-model-investigation-case-so-the-finding-can-be-reused.html Tue, 14 Jul 2026 00:00:00 GMT Validation and readiness The German migration team spends three weeks investigating why Customer Group cannot be mapped reliably. https://martenweave.github.io/blog/how-to-build-a-reusable-decision-library-for-sap-migration-and-mdm.html https://martenweave.github.io/blog/how-to-build-a-reusable-decision-library-for-sap-migration-and-mdm.html Tue, 14 Jul 2026 00:00:00 GMT Migration readiness A programme has an approved decision: https://martenweave.github.io/blog/how-to-prevent-local-sap-decisions-from-fragmenting-the-global-data.html https://martenweave.github.io/blog/how-to-prevent-local-sap-decisions-from-fragmenting-the-global-data.html Tue, 14 Jul 2026 00:00:00 GMT Model governance A country team raises a reasonable request. https://martenweave.github.io/blog/how-to-decide-whether-a-local-sap-requirement-belongs-in-the-global.html https://martenweave.github.io/blog/how-to-decide-whether-a-local-sap-requirement-belongs-in-the-global.html Tue, 14 Jul 2026 00:00:00 GMT Model governance A country team requests a new field: https://martenweave.github.io/blog/how-to-design-global-and-local-model-inheritance-without-creating.html https://martenweave.github.io/blog/how-to-design-global-and-local-model-inheritance-without-creating.html Tue, 14 Jul 2026 00:00:00 GMT Model governance The global supplier model defines Supplier Risk as a mandatory final classification for active strategic suppliers. https://martenweave.github.io/blog/how-to-resolve-conflicting-global-and-local-rules-before-they-reach-sap.html https://martenweave.github.io/blog/how-to-resolve-conflicting-global-and-local-rules-before-they-reach-sap.html Tue, 14 Jul 2026 00:00:00 GMT Model governance The global design states: https://martenweave.github.io/blog/how-to-test-global-and-local-sap-rules-against-real-migration-data.html https://martenweave.github.io/blog/how-to-test-global-and-local-sap-rules-against-real-migration-data.html Tue, 14 Jul 2026 00:00:00 GMT Migration readiness The global design says that Supplier Risk is mandatory for every active strategic supplier. https://martenweave.github.io/blog/how-to-turn-migration-rule-test-results-into-model-decisions-instead-of.html https://martenweave.github.io/blog/how-to-turn-migration-rule-test-results-into-model-decisions-instead-of.html Tue, 14 Jul 2026 00:00:00 GMT Migration readiness The first migration-rule test produces 8,420 failures. https://martenweave.github.io/blog/how-to-build-a-migration-finding-taxonomy-that-business-data-and-sap.html https://martenweave.github.io/blog/how-to-build-a-migration-finding-taxonomy-that-business-data-and-sap.html Tue, 14 Jul 2026 00:00:00 GMT Validation and readiness The migration test reports that 4,860 supplier records failed the Tax Identifier rule. https://martenweave.github.io/blog/how-to-route-migration-findings-to-the-right-owner-without-creating.html https://martenweave.github.io/blog/how-to-route-migration-findings-to-the-right-owner-without-creating.html Tue, 14 Jul 2026 00:00:00 GMT Validation and readiness A migration-readiness run identifies 1,284 strategic suppliers without Supplier Risk. https://martenweave.github.io/blog/how-to-define-data-ownership-that-still-works-after-the-sap-programme.html https://martenweave.github.io/blog/how-to-define-data-ownership-that-still-works-after-the-sap-programme.html Tue, 14 Jul 2026 00:00:00 GMT Model governance Three months after go-live, an AMS analyst receives an incident. https://martenweave.github.io/blog/how-to-build-an-ams-model-change-process-that-does-not-recreate-the-sap.html https://martenweave.github.io/blog/how-to-build-an-ams-model-change-process-that-does-not-recreate-the-sap.html Tue, 14 Jul 2026 00:00:00 GMT AMS and continuity Six months after go-live, a country requests a new Supplier Classification value. https://martenweave.github.io/blog/how-to-separate-sap-ams-incidents-service-requests-and-model-changes.html https://martenweave.github.io/blog/how-to-separate-sap-ams-incidents-service-requests-and-model-changes.html Tue, 14 Jul 2026 00:00:00 GMT Lineage and impact A user reports that a supplier cannot be activated in SAP. https://martenweave.github.io/blog/how-to-detect-when-an-sap-ams-workaround-has-become-an-unapproved-data.html https://martenweave.github.io/blog/how-to-detect-when-an-sap-ams-workaround-has-become-an-unapproved-data.html Tue, 14 Jul 2026 00:00:00 GMT AMS and continuity A supplier cannot be activated because its final risk classification is missing. https://martenweave.github.io/blog/how-to-retire-sap-ams-workarounds-without-breaking-the-business-process.html https://martenweave.github.io/blog/how-to-retire-sap-ams-workarounds-without-breaking-the-business-process.html Tue, 14 Jul 2026 00:00:00 GMT AMS and continuity A temporary Supplier Risk workaround has been running for nine months. https://martenweave.github.io/blog/how-to-use-ams-incident-patterns-to-improve-the-sap-data-model-instead.html https://martenweave.github.io/blog/how-to-use-ams-incident-patterns-to-improve-the-sap-data-model-instead.html Tue, 14 Jul 2026 00:00:00 GMT AMS and continuity The AMS dashboard shows progress. https://martenweave.github.io/blog/how-martenweave-represents-a-data-model-in-markdown-and-yaml.html https://martenweave.github.io/blog/how-martenweave-represents-a-data-model-in-markdown-and-yaml.html Tue, 14 Jul 2026 00:00:00 GMT Model governance A migration team needs to confirm the meaning of Customer Group . https://martenweave.github.io/blog/why-canonical-model-files-should-remain-the-source-of-truth.html https://martenweave.github.io/blog/why-canonical-model-files-should-remain-the-source-of-truth.html Tue, 14 Jul 2026 00:00:00 GMT AI governance A business owner updates Customer Group in an Excel review file. https://martenweave.github.io/blog/how-martenweave-builds-a-searchable-sqlite-model-index.html https://martenweave.github.io/blog/how-martenweave-builds-a-searchable-sqlite-model-index.html Tue, 14 Jul 2026 00:00:00 GMT Model governance A migration analyst searches for: https://martenweave.github.io/blog/how-deterministic-model-validation-works.html https://martenweave.github.io/blog/how-deterministic-model-validation-works.html Tue, 14 Jul 2026 00:00:00 GMT Validation and readiness A migration analyst adds a new mapping: https://martenweave.github.io/blog/how-martenweave-represents-entities-attributes-rules-and-relationships.html https://martenweave.github.io/blog/how-martenweave-represents-entities-attributes-rules-and-relationships.html Tue, 14 Jul 2026 00:00:00 GMT Model governance A migration workbook contains one row: https://martenweave.github.io/blog/how-to-version-a-data-model-without-turning-it-into-documentation-chaos.html https://martenweave.github.io/blog/how-to-version-a-data-model-without-turning-it-into-documentation-chaos.html Tue, 14 Jul 2026 00:00:00 GMT Model governance A Customer Group rule changes during an SAP programme. https://martenweave.github.io/blog/how-model-diffing-should-work-across-sap-releases.html https://martenweave.github.io/blog/how-model-diffing-should-work-across-sap-releases.html Tue, 14 Jul 2026 00:00:00 GMT Model governance An SAP programme compares its Wave 2 and Wave 3 model repositories. https://martenweave.github.io/blog/how-to-design-stable-ids-for-enterprise-data-model-objects.html https://martenweave.github.io/blog/how-to-design-stable-ids-for-enterprise-data-model-objects.html Tue, 14 Jul 2026 00:00:00 GMT Model governance A Customer Group attribute begins its life in one migration workbook. https://martenweave.github.io/blog/why-generated-indexes-should-be-disposable.html https://martenweave.github.io/blog/why-generated-indexes-should-be-disposable.html Tue, 14 Jul 2026 00:00:00 GMT Model governance A Martenweave user opens modelops.db and corrects the name of an Attribute directly in SQLite. https://martenweave.github.io/blog/how-to-package-and-transfer-a-martenweave-model-repository.html https://martenweave.github.io/blog/how-to-package-and-transfer-a-martenweave-model-repository.html Tue, 14 Jul 2026 00:00:00 GMT Model governance An SAP migration programme reaches handover. https://martenweave.github.io/blog/how-to-build-field-level-lineage-for-an-sap-migration.html https://martenweave.github.io/blog/how-to-build-field-level-lineage-for-an-sap-migration.html Tue, 14 Jul 2026 00:00:00 GMT Lineage and impact A migration programme says that it has lineage. https://martenweave.github.io/blog/why-table-level-lineage-is-not-enough-for-master-data.html https://martenweave.github.io/blog/why-table-level-lineage-is-not-enough-for-master-data.html Tue, 14 Jul 2026 00:00:00 GMT Lineage and impact A migration architect opens the lineage view and sees: https://martenweave.github.io/blog/how-to-trace-a-business-attribute-across-source-systems-mappings-and.html https://martenweave.github.io/blog/how-to-trace-a-business-attribute-across-source-systems-mappings-and.html Tue, 14 Jul 2026 00:00:00 GMT Lineage and impact A business owner asks: https://martenweave.github.io/blog/how-to-calculate-downstream-impact-before-changing-an-sap-field.html https://martenweave.github.io/blog/how-to-calculate-downstream-impact-before-changing-an-sap-field.html Tue, 14 Jul 2026 00:00:00 GMT Lineage and impact A technical team proposes a simple change: https://martenweave.github.io/blog/how-impact-analysis-should-work-for-rules-mappings-and-value-lists.html https://martenweave.github.io/blog/how-impact-analysis-should-work-for-rules-mappings-and-value-lists.html Tue, 14 Jul 2026 00:00:00 GMT Lineage and impact A team proposes three changes: https://martenweave.github.io/blog/how-to-detect-orphaned-fields-rules-and-mappings.html https://martenweave.github.io/blog/how-to-detect-orphaned-fields-rules-and-mappings.html Tue, 14 Jul 2026 00:00:00 GMT Migration readiness A repository validates successfully. https://martenweave.github.io/blog/how-to-detect-broken-lineage-after-a-source-or-target-system-change.html https://martenweave.github.io/blog/how-to-detect-broken-lineage-after-a-source-or-target-system-change.html Tue, 14 Jul 2026 00:00:00 GMT Lineage and impact A source system is retired. https://martenweave.github.io/blog/how-to-model-source-authority-and-fallback-paths-without-creating.html https://martenweave.github.io/blog/how-to-model-source-authority-and-fallback-paths-without-creating.html Tue, 14 Jul 2026 00:00:00 GMT Lineage and impact A migration team traces Customer Group upstream and finds four possible sources: https://martenweave.github.io/blog/how-to-separate-design-time-lineage-from-runtime-evidence.html https://martenweave.github.io/blog/how-to-separate-design-time-lineage-from-runtime-evidence.html Tue, 14 Jul 2026 00:00:00 GMT Lineage and impact A migration design states: https://martenweave.github.io/blog/how-to-use-lineage-evidence-during-mock-loads-cutover-and-hypercare.html https://martenweave.github.io/blog/how-to-use-lineage-evidence-during-mock-loads-cutover-and-hypercare.html Tue, 14 Jul 2026 00:00:00 GMT Lineage and impact Lineage is often treated as design documentation. https://martenweave.github.io/blog/how-to-build-a-lineage-based-migration-readiness-score-without-hiding.html https://martenweave.github.io/blog/how-to-build-a-lineage-based-migration-readiness-score-without-hiding.html Tue, 14 Jul 2026 00:00:00 GMT Lineage and impact A migration dashboard shows: https://martenweave.github.io/blog/how-to-explain-lineage-and-impact-to-business-owners-without-showing.html https://martenweave.github.io/blog/how-to-explain-lineage-and-impact-to-business-owners-without-showing.html Tue, 14 Jul 2026 00:00:00 GMT Lineage and impact A data architect opens a lineage viewer during a business review. https://martenweave.github.io/blog/how-lineage-supports-ams-root-cause-analysis-after-go-live.html https://martenweave.github.io/blog/how-lineage-supports-ams-root-cause-analysis-after-go-live.html Tue, 14 Jul 2026 00:00:00 GMT Lineage and impact A production incident arrives in the AMS queue: https://martenweave.github.io/blog/how-to-connect-dataset-gaps-to-lineage-and-business-impact.html https://martenweave.github.io/blog/how-to-connect-dataset-gaps-to-lineage-and-business-impact.html Tue, 14 Jul 2026 00:00:00 GMT Lineage and impact A dataset-readiness report says: https://martenweave.github.io/blog/how-to-prioritize-migration-gaps-by-business-risk-instead-of-field-count.html https://martenweave.github.io/blog/how-to-prioritize-migration-gaps-by-business-risk-instead-of-field-count.html Tue, 14 Jul 2026 00:00:00 GMT Migration readiness A readiness report identifies 137 data gaps. https://martenweave.github.io/blog/how-to-turn-migration-gap-findings-into-reviewable-patch-proposals.html https://martenweave.github.io/blog/how-to-turn-migration-gap-findings-into-reviewable-patch-proposals.html Tue, 14 Jul 2026 00:00:00 GMT Validation and readiness A profiling script finds that the Product migration dataset has no Plant field. https://martenweave.github.io/blog/why-ai-should-propose-model-changes-but-never-approve-them.html https://martenweave.github.io/blog/why-ai-should-propose-model-changes-but-never-approve-them.html Tue, 14 Jul 2026 00:00:00 GMT AI governance A Product migration dataset contains PLANNER GROUP , MRP TYPE and PROCUREMENT TYPE . https://martenweave.github.io/blog/why-a-data-catalogue-is-not-enough-for-migration-model-governance.html https://martenweave.github.io/blog/why-a-data-catalogue-is-not-enough-for-migration-model-governance.html Tue, 14 Jul 2026 00:00:00 GMT Migration readiness A migration team is preparing Product data for SAP S/4HANA. https://martenweave.github.io/blog/why-sap-mdg-is-not-a-replacement-for-a-migration-model-registry.html https://martenweave.github.io/blog/why-sap-mdg-is-not-a-replacement-for-a-migration-model-registry.html Tue, 14 Jul 2026 00:00:00 GMT SAP MDG and MDM A programme is migrating Supplier bank data into SAP S/4HANA. https://martenweave.github.io/blog/how-martenweave-should-work-alongside-sap-mdg-during-a-migration.html https://martenweave.github.io/blog/how-martenweave-should-work-alongside-sap-mdg-during-a-migration.html Tue, 14 Jul 2026 00:00:00 GMT SAP MDG and MDM A programme is migrating Supplier bank data from several legacy systems into SAP S/4HANA. https://martenweave.github.io/blog/why-migration-mapping-workbooks-become-technical-debt-and-what-should.html https://martenweave.github.io/blog/why-migration-mapping-workbooks-become-technical-debt-and-what-should.html Tue, 14 Jul 2026 00:00:00 GMT Migration readiness A migration programme creates a mapping workbook for Product planning data. https://martenweave.github.io/blog/how-we-convert-a-mapping-workbook-into-a-canonical-model-without-losing.html https://martenweave.github.io/blog/how-we-convert-a-mapping-workbook-into-a-canonical-model-without-losing.html Tue, 14 Jul 2026 00:00:00 GMT Migration readiness When we receive a migration mapping workbook, our first instinct should not be to convert every row into YAML. https://martenweave.github.io/blog/how-we-keep-business-decisions-traceable-after-the-mapping-workbook-is.html https://martenweave.github.io/blog/how-we-keep-business-decisions-traceable-after-the-mapping-workbook-is.html Tue, 14 Jul 2026 00:00:00 GMT Lineage and impact A migration team decides that MRP Controller must be derived differently for Plant PL30. https://martenweave.github.io/blog/how-we-prevent-temporary-migration-exceptions-from-becoming-permanent.html https://martenweave.github.io/blog/how-we-prevent-temporary-migration-exceptions-from-becoming-permanent.html Wed, 15 Jul 2026 00:00:00 GMT Migration readiness During Mock Load 2, the Product planning migration has a coverage problem. https://martenweave.github.io/blog/how-we-model-data-quality-rules-without-mixing-business-policy-and.html https://martenweave.github.io/blog/how-we-model-data-quality-rules-without-mixing-business-policy-and.html Wed, 15 Jul 2026 00:00:00 GMT Validation and readiness A migration programme is preparing Supplier bank data for SAP. https://martenweave.github.io/blog/how-we-turn-validation-failures-into-actionable-findings-instead-of.html https://martenweave.github.io/blog/how-we-turn-validation-failures-into-actionable-findings-instead-of.html Wed, 15 Jul 2026 00:00:00 GMT Validation and readiness We run a validation against a Supplier bank-data migration dataset. https://martenweave.github.io/blog/how-we-decide-whether-a-finding-requires-data-correction-a-mapping.html https://martenweave.github.io/blog/how-we-decide-whether-a-finding-requires-data-correction-a-mapping.html Wed, 15 Jul 2026 00:00:00 GMT Validation and readiness A Supplier bank-data validation fails for 3,400 records. https://martenweave.github.io/blog/how-we-prioritize-findings-by-business-impact-instead-of-error-count.html https://martenweave.github.io/blog/how-we-prioritize-findings-by-business-impact-instead-of-error-count.html Wed, 15 Jul 2026 00:00:00 GMT Lineage and impact We complete a Supplier bank-data validation run. https://martenweave.github.io/blog/how-we-prevent-duplicate-findings-across-mock-loads-and-migration-waves.html https://martenweave.github.io/blog/how-we-prevent-duplicate-findings-across-mock-loads-and-migration-waves.html Wed, 15 Jul 2026 00:00:00 GMT Validation and readiness We run the Supplier bank-verification check during Mock Load 2. https://martenweave.github.io/blog/how-we-connect-findings-to-owners-without-building-another-workflow.html https://martenweave.github.io/blog/how-we-connect-findings-to-owners-without-building-another-workflow.html Wed, 15 Jul 2026 00:00:00 GMT Validation and readiness We confirm a critical Supplier bank-data Finding. https://martenweave.github.io/blog/how-we-prove-that-a-finding-is-actually-resolved.html https://martenweave.github.io/blog/how-we-prove-that-a-finding-is-actually-resolved.html Wed, 15 Jul 2026 00:00:00 GMT Validation and readiness We identify a critical Supplier bank-data Finding. https://martenweave.github.io/blog/how-we-detect-when-evidence-has-become-stale.html https://martenweave.github.io/blog/how-we-detect-when-evidence-has-become-stale.html Wed, 15 Jul 2026 00:00:00 GMT Model governance We resolve a critical Supplier bank-data Finding during Cutover Rehearsal 5. https://martenweave.github.io/blog/how-we-build-a-migration-readiness-view-that-does-not-hide-exceptions.html https://martenweave.github.io/blog/how-we-build-a-migration-readiness-view-that-does-not-hide-exceptions.html Wed, 15 Jul 2026 00:00:00 GMT Migration readiness The Supplier migration dashboard shows: https://martenweave.github.io/blog/how-we-separate-technical-completeness-from-business-readiness.html https://martenweave.github.io/blog/how-we-separate-technical-completeness-from-business-readiness.html Wed, 15 Jul 2026 00:00:00 GMT Model governance A Supplier migration load finishes successfully. https://martenweave.github.io/blog/how-we-use-model-evidence-during-cutover-approval.html https://martenweave.github.io/blog/how-we-use-model-evidence-during-cutover-approval.html Wed, 15 Jul 2026 00:00:00 GMT Migration readiness The Supplier migration team completes the final rehearsal. https://martenweave.github.io/blog/why-a-successfully-loaded-material-may-still-be-unusable.html https://martenweave.github.io/blog/why-a-successfully-loaded-material-may-still-be-unusable.html Wed, 15 Jul 2026 00:00:00 GMT Logistics data The material migration report looks successful. https://martenweave.github.io/blog/how-we-detect-missing-material-extensions-before-cutover.html https://martenweave.github.io/blog/how-we-detect-missing-material-extensions-before-cutover.html Wed, 15 Jul 2026 00:00:00 GMT Logistics data The material migration team reports: https://martenweave.github.io/blog/why-units-of-measure-are-one-of-the-most-dangerous-logistics-migration.html https://martenweave.github.io/blog/why-units-of-measure-are-one-of-the-most-dangerous-logistics-migration.html Wed, 15 Jul 2026 00:00:00 GMT Logistics data The unit-of-measure migration report looks harmless. https://martenweave.github.io/blog/how-we-model-packaging-hierarchies-without-losing-logistics-meaning.html https://martenweave.github.io/blog/how-we-model-packaging-hierarchies-without-losing-logistics-meaning.html Wed, 15 Jul 2026 00:00:00 GMT Logistics data The material migration team reports that packaging data is complete. https://martenweave.github.io/blog/why-s4-material-readiness-does-not-prove-ewm-readiness.html https://martenweave.github.io/blog/why-s4-material-readiness-does-not-prove-ewm-readiness.html Wed, 15 Jul 2026 00:00:00 GMT Logistics data The material migration dashboard is green. https://martenweave.github.io/blog/how-we-create-a-canonical-location-model-across-erp-ewm-tm-and-external.html https://martenweave.github.io/blog/how-we-create-a-canonical-location-model-across-erp-ewm-tm-and-external.html Wed, 15 Jul 2026 00:00:00 GMT Logistics data What happens when five systems agree that a location exists—but none of them agrees on what the location actually is? https://martenweave.github.io/blog/how-we-govern-lead-times-across-procurement-production-warehouse-and.html https://martenweave.github.io/blog/how-we-govern-lead-times-across-procurement-production-warehouse-and.html Wed, 15 Jul 2026 00:00:00 GMT Logistics data What exactly are we promising when we say the lead time is 12 days? https://martenweave.github.io/blog/why-sap-data-programmes-pay-consultants-to-rediscover-the-same-knowledge.html https://martenweave.github.io/blog/why-sap-data-programmes-pay-consultants-to-rediscover-the-same-knowledge.html Wed, 15 Jul 2026 00:00:00 GMT Model governance Why are we paying senior consultants to answer the same question for the fourth time? https://martenweave.github.io/blog/how-a-canonical-data-and-interface-registry-reduces-change-impact.html https://martenweave.github.io/blog/how-a-canonical-data-and-interface-registry-reduces-change-impact.html Wed, 15 Jul 2026 00:00:00 GMT Lineage and impact Why can changing one master-data field require six weeks of analysis? https://martenweave.github.io/blog/why-mapping-workbooks-become-a-recurring-consulting-cost.html https://martenweave.github.io/blog/why-mapping-workbooks-become-a-recurring-consulting-cost.html Wed, 15 Jul 2026 00:00:00 GMT Migration readiness How many times should a transformation programme pay to map the same 1,400 legacy codes? https://martenweave.github.io/blog/how-much-does-a-green-dashboard-cost-when-every-team-rebuilds-the.html https://martenweave.github.io/blog/how-much-does-a-green-dashboard-cost-when-every-team-rebuilds-the.html Wed, 15 Jul 2026 00:00:00 GMT Model governance How much consulting effort sits behind one green status on a steering-committee slide? https://martenweave.github.io/blog/why-consultant-turnover-makes-sap-programmes-pay-twice-for-the-same.html https://martenweave.github.io/blog/why-consultant-turnover-makes-sap-programmes-pay-twice-for-the-same.html Wed, 15 Jul 2026 00:00:00 GMT Model governance What exactly leaves the programme when an experienced consultant leaves? https://martenweave.github.io/blog/where-martenweave-fits-in-logistics-managing-the-data-behind-operations.html https://martenweave.github.io/blog/where-martenweave-fits-in-logistics-managing-the-data-behind-operations.html Wed, 15 Jul 2026 00:00:00 GMT Logistics data Logistics problems are often described as operational problems. https://martenweave.github.io/blog/logistics-problems-rarely-start-in-logistics.html https://martenweave.github.io/blog/logistics-problems-rarely-start-in-logistics.html Wed, 15 Jul 2026 00:00:00 GMT Logistics data When a delivery fails, people usually look at the delivery. https://martenweave.github.io/blog/sap-logistics-data-migration-problems-usually-appear-too-late.html https://martenweave.github.io/blog/sap-logistics-data-migration-problems-usually-appear-too-late.html Wed, 15 Jul 2026 00:00:00 GMT Logistics data Most SAP logistics migration problems are discovered at the worst possible moment. https://martenweave.github.io/blog/what-is-a-data-model-registry-a-practical-guide-for-managers.html https://martenweave.github.io/blog/what-is-a-data-model-registry-a-practical-guide-for-managers.html Wed, 15 Jul 2026 00:00:00 GMT Model governance Most companies do not lack documentation. https://martenweave.github.io/blog/why-data-migration-projects-need-a-model-registry.html https://martenweave.github.io/blog/why-data-migration-projects-need-a-model-registry.html Wed, 15 Jul 2026 00:00:00 GMT Migration readiness Most migration programmes do not fail because nobody created a mapping. https://martenweave.github.io/blog/from-mapping-spreadsheet-to-governed-data-model.html https://martenweave.github.io/blog/from-mapping-spreadsheet-to-governed-data-model.html Wed, 15 Jul 2026 00:00:00 GMT Migration readiness Most migration programmes begin with a spreadsheet. https://martenweave.github.io/blog/data-lineage-vs-impact-analysis-why-seeing-the-flow-is-not-enough.html https://martenweave.github.io/blog/data-lineage-vs-impact-analysis-why-seeing-the-flow-is-not-enough.html Wed, 15 Jul 2026 00:00:00 GMT Lineage and impact Data lineage is one of the most attractive ideas in data management. https://martenweave.github.io/blog/data-quality-tools-vs-model-validation-clean-data-can-still-follow-the.html https://martenweave.github.io/blog/data-quality-tools-vs-model-validation-clean-data-can-still-follow-the.html Wed, 15 Jul 2026 00:00:00 GMT Validation and readiness A data-quality report can be completely green while the migration is still wrong. https://martenweave.github.io/blog/schema-registry-vs-model-registry-technical-compatibility-is-not.html https://martenweave.github.io/blog/schema-registry-vs-model-registry-technical-compatibility-is-not.html Wed, 15 Jul 2026 00:00:00 GMT Model governance A message can be technically valid and still be wrong. https://martenweave.github.io/blog/why-sap-migration-teams-still-lose-control-even-with-the-right-tools.html https://martenweave.github.io/blog/why-sap-migration-teams-still-lose-control-even-with-the-right-tools.html Wed, 15 Jul 2026 00:00:00 GMT AMS and continuity An SAP migration programme may have every major tool it is supposed to have. https://martenweave.github.io/blog/mapping-version-drift-why-sap-migration-teams-keep-reopening-the-same.html https://martenweave.github.io/blog/mapping-version-drift-why-sap-migration-teams-keep-reopening-the-same.html Wed, 15 Jul 2026 00:00:00 GMT AMS and continuity Most migration teams believe they have a mapping problem only when a field is missing. https://martenweave.github.io/blog/sap-migration-tco-how-model-governance-reduces-rework-and-project-cost.html https://martenweave.github.io/blog/sap-migration-tco-how-model-governance-reduces-rework-and-project-cost.html Wed, 15 Jul 2026 00:00:00 GMT Migration readiness The licence fee is rarely the most dangerous part of migration cost. https://martenweave.github.io/blog/why-martenweave-creates-more-value-across-a-programme-than-in-a-single.html https://martenweave.github.io/blog/why-martenweave-creates-more-value-across-a-programme-than-in-a-single.html Wed, 15 Jul 2026 00:00:00 GMT Model governance A small migration project may not need Martenweave. https://martenweave.github.io/blog/why-data-governance-frameworks-stay-on-paper-during-sap-programmes.html https://martenweave.github.io/blog/why-data-governance-frameworks-stay-on-paper-during-sap-programmes.html Wed, 15 Jul 2026 00:00:00 GMT Model governance Many organisations already know what good data management should look like. https://martenweave.github.io/blog/why-dama-based-data-governance-fails-to-reach-sap-migration-teams.html https://martenweave.github.io/blog/why-dama-based-data-governance-fails-to-reach-sap-migration-teams.html Wed, 15 Jul 2026 00:00:00 GMT AMS and continuity Many companies have a data-governance framework.