Compare the operating models
A fictional repair shop sells replacement filters and charges for fitting. The filter can be counted on a shelf; fitting is work performed for a customer. A single price does not make them the same fulfilment object.
| Business requirement | Stock item | Service |
|---|---|---|
| Replacement filter | SKU and quantity leave stock | Would lose material movement |
| Fitting work | Cannot be received onto a shelf | Scope, appointment and completion |
| Combined offer | Retain included material | Retain promised work |
Work through the chosen model
A combined offer may present one customer price while retaining a filter line and a fitting task internally. The filter record needs SKU/unit/location. The work record needs customer site, included activity and completion reference. Pricing and fulfilment need not share one granularity.
- Choose included item and work
- Pick material and arrange service
- Record delivery and work completion
Separate internal lines improve stock and service clarity but require a deliberate customer presentation. Do not expose technical bookkeeping lines if the customer only needs the agreed scope and price.
Two filter-and-fit offers consume two filters and create two fitting tasks. Finishing one task does not consume another filter; the earlier material handover remains the stock event.
When the other model fits
The customer supplies the filter and buys fitting only. Must the shop reduce its own filter stock?
Show the worked answer
No. Record the supplied customer item where needed and sell the fitting service.