maintenance cost posting to production Cost center

Hi Experts,

I'm looking some guidance for maintenance cost posting. My client has two kind of maintenance teams-

1. For small/regular maintenance (Team A)- there's a team for doing small/regular preventive maintenance activities. This team is a part of production Deptt. and having no separate cost center other than the production one.

2. Major PM activities (Team B)- this team handles critical repair/Breakdowns or large maintenance jobs. This is having their own Cost center

Now , say, on a Functional location (having the main work center as Team B work center ), some major PM activity is done by team B , hence the cost will be posted to team B's cost center.

But the problem comes when Team A (under Production) perform some maintenance job on this Functional location. By default when work order gets created, for this Func. Location, the default CC (assigned to main work center) gets copied into order. which need to be manually replaced by the user with production Cost center (since maintenance is done by Team A -belongs to Production)

Please help to provide inputs on-

1. How to post the cost to production CC in case of maintenance done by team A. Is there any std. or enhancement for selecting the production CC . if yes, what would be the logic?

2. In production CC , on what basis the cost can be segregated between production expenses and maintenance expenses.

Please provide your inputs

Thanks