CO and Process order without material using T. Code CORO

Question

Hi
We need to use Process Order without material functionality for recording "changeover" time and cost (i.e. setting up process for production of other material in a production line).
For this purpose we have configured a separate process order type. We have created a separate activity for Changeover and planned rates using KP26.
Now we create Process Order without material using T. Code CORO and confirm it using COR6N. On confirmation system successfully credits Cost Center.
We need to know:
1) whether we should settle the process order as well or no need to assign settlement profile to Order Type
2) Or should we run Cost Estimate first.
Plz help, if any have idea

Answer 1

Thank you all for your valuable input.
Srinivasa, your suggestion is very good, especially when calculation of variances/WIP is required. But again as there is no cost relevant material where the WIP/Variances will be settled during settlement process?
1) PP need to create process order without material because changeover cost should not be charged to either material and capacity hours are consumed during changeover. 2) CO need to identify the cost of changeover which should be charged to cost center. So far we have achieved both of these two objectives by the following activities:
Creation of Process Order without material using CORO T.Code     say 3 hours of changeover occurred we create order with quantity of 3 Hours. And confirmation of activities quantity 3 using COR6N so cost center is credited by 3 x rate per hour. As there is a separate Process Order type for Changeover we can identify changeover quantity and cost in a given period.
After contributors feedback in this thread I have come to conclusion that I don't need to assign Settlement Profile and PA Structure to Changeover Process Order type. So no need to run Process Order settlement. As there is no specific required for Changeover WIP/Variances as well.