Lesson 4 of 5
Where make-to-order breaks
10 min
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MTO touches sales, planning, production, inventory, costing and billing in one chain. Each handoff relies on a setting someone else owns. That makes MTO one of the highest-risk integration areas in any SAP program, and a common source of defects after a conversion, when old custom settings meet new defaults.
- SalesItem category and requirement type decide whether the item is MTO
- PlanningStrategy group and MRP settings decide whether a sales order segment is planned
- ProductionAccount assignment to the item; components from the right stock
- InventoryReceipt into sales order stock with a valuation price
- FinanceSettlement, cost of sales and margin per item
- Delivery and billingPick from sales order stock; bill the right quantity
Common failures and how to diagnose them
| Symptom | Likely cause | How to diagnose |
|---|---|---|
| No planned order for the sales order item | Strategy group missing or wrong; requirement type not MTO; item category not MTO | MRP view of the material; item details in the sales order; MD04 segment |
| Production order not linked to the sales order | Order created manually without account assignment, or conversion from a wrong planned order | Order header account assignment; MD04 pegging |
| Goods receipt fails with a valuation error | No valuation price: no standard price or missing sales order cost estimate | Error message at receipt; costing status of the item |
| Delivery picks own stock instead of sales order stock | Item not MTO in the delivery, or stock not received as special stock E | Delivery item; material document of the receipt |
| Margin per order looks wrong | Settlement not run, wrong settlement receiver, or cost estimate not matching the configuration | Order settlement, item costs, cost estimate |
| Leftover sales order stock after a change | Order quantity reduced after production | Stock overview of special stock E by sales order |
MTO failure points and where to look.
Requirement type, strategy and costing
Three settings deserve special attention because they hide inside configuration and master data. The strategy group on the material decides which strategy is proposed. The requirement type on the sales order item, found through the strategy or the item category, links to a requirements class that decides planning, account assignment and valuation. And the costing settings decide whether a sales order cost estimate is needed and how stock is valued. If any one is wrong, the chain breaks somewhere later, and the symptom appears far from the cause.
- Does MD04 show a separate segment for the sales order item?No → check strategy group, requirement type and item category · Yes → next question
- Is the production order account-assigned to the item?No → check how the order was created or converted · Yes → next question
- Did the receipt post into special stock E with a value?No → check valuation settings and cost estimate · Yes → next question
- Did the delivery issue from special stock E?No → check the delivery item and stock · Yes → check settlement and margin
Conversion adds its own failure points. Settings copied from ECC may reference requirement types or item categories that were customized years ago. Custom code in sales order or MRP exits may assume old tables. Open MTO orders at cutover need their sales order stock, production orders and costs to arrive consistent. Luis's cutover plan for Contoso lists every open MTO item at cutover with its stock and order status, so Priya's team can reconcile them after the conversion.
What would you do?
After the second mock conversion, MTO receipts for CMC-ALT-240 fail with a valuation error, although they worked in ECC. Kenji finds no code changes. What should the team check first?
| Contoso finding (mock conversions) | Where in the chain | Fix |
|---|---|---|
| Sales order item for CMC-ALT-240 planned against plant stock | Strategy group missing on the converted material in plant 1720 | Strategy group 20 maintained; retest |
| Receipt fails: no valuation price | Valuated stock E needs a sales order cost estimate that was not configured as required | Costing settings of the requirements class corrected |
| Delivery cannot pick the 50 pieces | Stock posted to 171A as own stock by a manual 411 E | Transfer back with 413 / 412 E; manual transfers restricted |
| Margin report shows zero cost for the item | Production order settled to the material, but report expects item-level costs | Report variant aligned with valuated design |
Illustrative course data: MTO defects found in Contoso's mock conversions, each located on the chain.
- MTO crosses sales, planning, production, inventory, costing and billing: many handoffs, many failure points.
- Strategy group, requirement type and costing settings are the usual hidden causes.
- Diagnose forward along the chain; the first wrong object is usually the cause.
- In a conversion, reconcile open MTO items at cutover.
Check your understanding · not graded
Lesson check
1. A sales order item has no own segment in MD04. Which setting is most suspect?
2. Why diagnose MTO failures in the direction of the flow?
3. A delivery picks own stock for an MTO item. What does that indicate?
4. An MTO item in plant 1720 is planned against plant stock instead of its own segment. Where is the first object to check?