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Material Master
MM / P2Padvanced

MM Material Master Part 5: S/4HANA Material Governance, Migration and Data Quality

Key takeaway

Material master in S/4HANA projects: product master and 40-character material numbers, material ledger, migration via the migration cockpit or conversion, cleansing and harmonization across legacy systems, governance with MDG, and keeping extension, status and classification data consistent.

Explanation

📌 KEY POINTS
✅ S/4HANA supports 40-character material numbers (when activated) and the product master in Fiori.
✅ Material ledger is active for valuation in S/4HANA.
✅ Migration: conversion keeps materials; new implementations load via the migration cockpit after cleansing and harmonization.
✅ Governance (e.g. MDG) controls creation and changes with workflows and validations.
⚠️ Harmonizing duplicate materials across plants/systems is a business decision — not a technical afterthought.

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▶ WHERE WE ARE
Part 4 covered the procurement data chain. Now governance and migration.

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▶ 1. S/4HANA CHANGES

  • Product master apps, extended material number, material ledger.

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▶ 2. MIGRATION

  • Conversion: materials remain; check field length impacts in custom code/interfaces.
  • New implementation: migration cockpit templates, mapping, validation.

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▶ 3. CLEANSING AND HARMONIZATION

  • Duplicates, obsolete materials, units, descriptions, classifications.

━━━━━━━━━━━━━━━━━━━━
▶ 4. GOVERNANCE

  • MDG change requests, approvals, validations, central creation and distribution.

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▶ 5. DATA QUALITY

  • KPIs: incomplete views, obsolete but active, duplicates; status for phase-out.

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▶ STEP BY STEP

  1. Profile legacy materials.
  2. Decide harmonization rules.
  3. Map and load test data.
  4. Set up governance workflows and KPIs.

✅ CHECKPOINT: every migrated material is unique, complete for its plants and owned.

Code example

ABAP Code
===== STEP 1: migration =====Migration cockpit: product (material) templates → mapping → validation → load | conversion: check interfaces for 40-char numbers ===== STEP 2: harmonization =====Duplicate detection (description, MPN, classification) → golden record → mapping table old → new ===== STEP 3: governance =====MDG change request: create/extend material → validations → approvals → activation/distributionKPIs: duplicates | incomplete views | obsolete active materials

Real project scenario

A conversion migrated 120,000 material numbers, including 30,000 unused and many duplicates. Planning and purchasing slowed, and users picked wrong duplicates. Post go-live cleansing with status-based phase-out, a mapping of duplicates to golden records and MDG-based creation reduced active materials by 35%.

Common mistakes

  • Migrating everything.
  • Ignoring duplicates.
  • No ownership.
  • Missing status for obsolete materials.
  • Interfaces not checked for field length.

Best practices

  • Cleanse before migration.
  • Define golden records.
  • Govern creation centrally.
  • Use status for phase-out.
  • Measure quality continuously.

Interview angle

Questions: "How do you migrate material masters to S/4HANA?", "How do you handle duplicates?", "What is MDG used for?"
Strong answer: S/4 changes (product master, 40-char, material ledger), conversion vs migration cockpit, cleansing and harmonization, MDG governance, KPIs and status.

Practice this lesson

Quick check

1. A conversion migrated 120,000 materials, many unused or duplicated. What should have happened before migration?

2. What is a typical purpose of MDG for material master data?

3. Which tool is typically used to load material masters in a new S/4HANA implementation?

Interview questions

1. Your client is migrating from ECC to S/4HANA Public Cloud with Ariba integration for indirect procurement. The material master no longer supports certain legacy fields used by their custom pricing logic. How would you approach reconciling material master simplifications with Ariba catalog and contract data?

Answer it in your own words first, then compare.

2. How does the classification system (class and characteristics) integrate with material type configuration to support material master governance in a multi-category enterprise?

Answer it in your own words first, then compare.

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Reference-verified: the steps are checked against official SAP documentation and tutorials, and object and field names in the sample code are checked for consistency. The code has not been compiled or run on an SAP system by ERPClimb. Syntax marked release-dependent varies by SAP release, so check it in your own system.

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