Going through the following checklist will helps to reduced your costing estimate run errors:
1. Check whether BOM exist for all the In-house manufactured products and the sub-contracted products.
2. Check whether routing exists for all the in-house manufactured products.
3. check the validity date of the BOM & Routing for the FERT and the HALB materials.
4. Check activity type are maintained for the work center that used in the Routing or else Rate routing depending on the business.
5. Check activity are maintained for the costing period and the prices rate for the cost center that you assigned to the work center in KP27.
6. Check proper production version has been maintained or not in C223 ,incase if you are going to use PV for costing run.
7. Check whether a sub-contracting purchase info record exists for all the sub-contracted products(ME11 will be used for creating PIR - Purchase Info Record) and a source list using ME01.
8. Check whether the rates are properly assigned for activity type and cost center combination (KP27 can be used for checking this).
9. Use CK40N for taking the cost rollup.
10. Use CK11N only for the products for which you want to select a particular BOM or production version or routing for costing purpose and later on Mark and release the cost using CK24.
11. Check what's the first priority given to the valuation variant for costing the raw materials say like planned price or else moving average price using the T Code OKKN and OKK4.
12. After taking the cost rollup these costs gets stamped in the material master and henceforth all the stock will be valuated using this price.
13. At any point you will be able to tell the product cost of a product which is only a planned and it can be more or less once after completing the production and then the variances can be calculated and settled.
14. Ensure the user has got the full authorization for taking the costing run to save, mark, release.
