Sap Mm

1. Procurement Cycle

PR (ME51N) → RFQ (ME41) → Quotation (ME47) → PO (ME21N)
→ GR (MIGO 101) → IV (MIRO) → Payment (F110)

Shortcut flows:

• Without RFQ: PR → PO (ME58 — auto-convert PR to PO)
• Consignment: PO item cat K → GR → settlement (MRKO)
• Subcontracting: PO item cat L → GI components → GR finished

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2. Purchase Order Issues

Account assignment errors

• Category K (cost center): cost center must exist and be active
• Category A (asset): asset master must exist, depreciation area active
• Category F (internal order): order must be in Released status
• Category P (project/WBS): WBS element must be open for costs

Tolerance check (MIRO)

• OMR6 → tolerance keys: BD (amount) / VP (moving avg price variance) / PP (price)
• Tolerance = percentage + absolute amount — both must be within limits

GR-based invoice verification

• PO item → Invoice tab → GR-Based IV flag = X
• With flag: MIRO only possible after GR; invoice quantity = GR quantity

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3. Goods Receipt (MIGO)

Key Movement Types

| MVT | Description | Notes | |-----|-------------|-------| | 101 | GR for purchase order | Standard GR | | 102 | Return to vendor (reversal of 101) | Requires original GR doc | | 122 | Return delivery to vendor | With return PO | | 161 | GR for return PO | For returns with credit | | 201 | GI to cost center | Free goods issue | | 261 | GI for production order | Component consumption | | 301 | Transfer plant to plant (1 step) | Same company code | | 311 | Transfer storage location to storage location | Same plant | | 551 | Scrapping | Write-off to loss account |

Account Determination (OBYC)

• Transaction key BSX: inventory posting (stock G/L account)
• Transaction key WRX: GR/IR clearing account
• Transaction key PRD: price difference account (standard price)
• Transaction key GBB: goods issue / offsetting accounts
• Valuation class (material master → Accounting 1) links material to G/L accounts

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4. Invoice Verification (MIRO)

Blocking reasons

| Code | Reason | Release T-code | |------|--------|----------------| | R | Manual block | MR02 / MRBR | | A | Amount exceeds tolerance | MRBR (automatic) | | D | Date issue | MRBR | | Q | Quantity variance | MRBR | | P | Price variance | MRBR |

Parked invoices: MIR7 (park) → MIRA (mass release) / MIR4 (display)

Credit memos: MIRO → transaction = Credit Memo → reverses original invoice logic

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5. Inventory Management

Physical inventory process

1. MI01: create physical inventory document → print count sheet
2. MI04: enter count results (or MI09 if system count differs)
3. MI07: post inventory differences → generates MM document + FI document
4. MI20: list of inventory differences for review

Key reports

| T-code | Report | |--------|--------| | MMBE | Stock overview (all stock types) | | MB52 | Warehouse stocks of material | | MB53 | Plant stock availability | | MB5B | Stocks for posting date | | MB51 | Material document list |

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6. Material Master Key Views

| View | Key Fields | |------|-----------| | MRP 1 | MRP type, MRP controller, lot size procedure | | MRP 2 | Planned delivery time, safety stock | | MRP 3 | Strategy group (make-to-stock vs make-to-order) | | MRP 4 | BOM explosion, individual/collective requirements | | Accounting 1 | Valuation class, price control (S/V), standard/moving avg price | | Purchasing | Purchasing group, info update, GR processing time | | Plant Data/Stor.1 | Storage conditions, shelf life, batch management |

Extend to new plant: MM01 → select org levels → plant / storage location

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7. MM Period Close

• MMPV: close MM posting period — must precede FI period close (OB52)
• MMRV: allow posting to previous MM period (emergency use only — document reason)
• Check open GR/IR before closing: MB5S → identify items needing MR11

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8. S/4HANA MM Differences

| Topic | ECC | S/4HANA | |-------|-----|---------| | Material document tables | MKPF / MSEG | MATDOC | | CDS access | SELECT MKPF/MSEG | IMaterialDocumentItem | | Stock in transit | Not available | New concept for plant-to-plant | | Inbound delivery | Optional | Mandatory for some scenarios | | MRP run | MD01 | MD01N (MRP Live — HANA optimized) | | Purchase order history | EKBE | IPurchaseOrderHistory (CDS) |

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: BoxLogoDev
• Source: BoxLogoDev/sapstack
• License: MIT

Install and usage instructions live in the source repository linked above.