My recommendation and suggestions would be based on normal manufacturing industries which has a turnaround of 1000 crores INR.
To make end user job easier or simpler, this has to be done in the implementation, I will explain in detail.
Cost Element Accounting
I have seen some customers those who use manual creation of cost elements, User’s sometime choose a wrong cost element category. So my suggestion would be to use controlling integration as automatic creation of cost elements. By doing this, if users creates a General ledger a/c for expenses or revenue, the system automatically create a cost elements with the particular cost element category. Below is the sample default setting, one can set as many accounts and cost element category.
For secondary cost elements , always use the series of 900000+
Cost Center Accounting,
Cost center – my suggestion would be to create cost center for 4 or 5 digits. Eg., 1001 as ACCOUNTS & FINANCE.
Activity Types – Create activity type by mentioning AT**, for example, create AT01 as CUTTING & BENDING, AT02 as MACHINE HOURS
Internal Order Accounting,
Order types – create internal order types starting with 0100 , after that 0200 and go on. Refer the below screen shot.
Internal order – Have more than 7 digit number ranges for internal order. Internal orders are very important in controlling module as it also used for process order or production order.