Overhead calculation not happening after using Overhead key and orgin group

Question

overhead calculation not happening after using Overhead key and orgin group.
There was a runtime error earlier related to u201Cdefine credit u201C IMG node under costing sheet component and we have applied SAP note 769946 and that error was gone out of the way
We want to apply/add Overhead to SFG/FG materials.
We are using PP order with PCC(product cost collector) as the cost object , i.e costing by period.(system ECC 6)
But our problem is with material standard cost estimate process.
We have assigned overhead keys to the percentage rates in costing sheet for material standard costing and assigned the origin groups to the credits of costing sheet. But after running the cost estimate overhead is not taking into account for standard cost calculation.
In the define credit entry table key field is valid to date strangly and actually system should allow one than one entry with same valid to date and same sec.Cost element(type-41) for different cost centers.
But if we without using overhead key and origin group, the entire cost in that supporting cost center will come to all materials (SFG/FG) and we can not distinguish between different product materials(SFG /FG).
We have checked all things as mentined below.
Firstly that the correct costing sheet is assigned to the valuation
variant.
That the costing sheet is entered for the appropriate material type:
Finished and semi finished or material components.
All of the above can be checked and verified via transaction OKKN.
In addition make sure that the base value maintained is present in the
costing, for example the base may include an Origin group, is that
origin group part of the materials being costed?
Similarly if the base is found and values exist how is the overhead
rate of the costing sheet set up, is it valid etc.
And finally do a similar check for the credit.
we doubt this as a programm error...
So, request all experts to have ur feedback..

Answer 1

Dear,
Check your origin group & material unit of mesaurement is same.
some time in costing sheet origin group is maintain in different unit & for materail it's maitain in other unit of mesaurement.
You can see unit of measure for material in Additional data - unit of measure.
Check BOM component material unit also.
Check same  unit of measure is maintain in KZS2
I hope above will useful.
GOPAN