Plan to produce (PP)

Production in SAP rests on three pieces of master data, set up once:

• Bill of materials (CS01): the components per product. A bike = frame + wheels + seat + chain.
• Work centers (CR01): machines, lines or teams with capacity, each linked to a cost center.
• Routings (CA01): the sequence of operations with setup and run times per work center.

Together with prices and activity rates they produce the standard cost of each product (cost estimate, CK11N).

Then the cycle runs for every production period:

Step	T-code	What happens
Demand	MD61	Forecast entered as planned independent requirements, plus sales orders
MRP	MD01N, MD04	Nets demand, explodes BOMs; planned orders to make, requisitions to buy
Production order	CO01, or convert a planned order	Components reserved, operations scheduled, availability checked
Release	CO02	Order becomes executable; components staged to the line
Goods issue	MIGO, movement type 261 (or backflush)	Components leave stock, cost charged to the order
Confirmation	CO11N	Quantities, scrap and time reported per operation
Goods receipt	MIGO, movement type 101	Finished goods into stock, now available to promise
Settlement	KO88 or CO88	Variances between actual and standard cost go to finance; order closed

Backflushing issues components automatically when an operation is confirmed, which saves effort but silently corrupts stock if BOM quantities are wrong. Settlement is easy to forget: unsettled orders leave costs stuck in work in progress at month end.

The life of a production order

Checks before and during execution

• Material availability: at creation or release, the order checks whether components will be available. Shortages appear in the missing parts list (CO24).
• Capacity: the routing’s setup and run times load each work center. Capacity evaluation (CM01) shows overloads; capacity levelling (CM21) or PP/DS in S/4HANA reschedules operations to fit.
• Scheduling: operations are scheduled backwards from the due date or forwards from the start, including queue and move times.

Goods movements

• 261: components issued to the order (manually, or by backflush at confirmation).
• 262: reversal of a component issue.
• 101: finished product received from the order.
• 531: by-product received.

Failed automatic movements, such as a backflush with no stock, land in COGI for correction; until they are cleared, stock and costs are wrong.

Costs from plan to settlement

The standard cost is 1,000 USD a bike, so the plan is 100,000 USD: 70,000 of components and 30,000 of labour and machine time.

• Actual: extra scrap used 72,000 USD of components, and a slow line used 31,000 USD of activities: 103,000 USD collected on the order.
• Goods receipt of 100 bikes credits the order at standard: 100,000 USD.
• Balance: 3,000 USD left on the order. Variance calculation splits it into categories (input quantity for the scrap, resource usage for the extra time), and settlement (KO88, or CO88 for many orders) moves it to finance, typically a price difference account or margin analysis.

Orders still open at month end hold their costs as work in process, calculated before settlement so the balance sheet is right.

Three manufacturing styles

• Discrete manufacturing: production orders for each batch, as above. Suits job shops and varied products.
• Repetitive manufacturing: for stable, high-volume lines, production is planned as run schedule quantities, reported with simple backflushing confirmations and costed by period on a product cost collector, without individual orders.
• Process manufacturing (PP-PI): process orders and master recipes for chemicals, food and pharmaceuticals, with batch management, resources instead of work centers, and process instructions.

Kanban in SAP supports pull replenishment between supply areas and production.

Make to order

In make-to-order (for example, strategy 20), each sales order gets its own planned and production orders, and the finished goods go into sales order stock, reserved for that customer and valued separately. Costs can be tracked by order, which matters for configured or engineered products.

Product costing

1. Maintain BOMs, routings, work center activity types and planned activity prices.
2. Create a cost estimate (CK11N) that rolls up material and activity costs.
3. Mark and release it (CK24) as the material’s standard price for the period.
4. Compare actual order costs with the standard and analyse variances by category.

With the material ledger active in S/4HANA, actual costing can revalue inventory and cost of goods sold to actual costs at period end, if the company uses it.

PP/DS and MES

PP/DS (production planning and detailed scheduling), embedded in S/4HANA, schedules orders on finite capacity with setup optimization and sequence rules. A manufacturing execution system on the shop floor dispatches operations, records machine data and confirmations, and sends them back to S/4HANA.

Problems that keep plants up at night

• Orders can’t be released: missing parts, status blocks, or missing master data.
• Backflush errors pile up in COGI, so stock and costs drift.
• Capacity overloads ignored by MRP, so planned dates are unrealistic.
• Orders left open or unsettled, so costs stay in work in process and variances appear late.
• BOM or routing changes not reflected in costing, so standards are wrong.