How do you maintain multiple shift depreciation in asset master in SAP?

The following steps are needed to maintain multiple shift depreciation:
1. The variable depreciation portion as a percentage rate is to be maintained in the detail screen of the depreciation area.
2. The multiple shift factor is to be maintained in the time dependent data in the asset master record. This shift factor is multiplied by the variable portion of ordinary depreciation. Once you have done the above the SAP system calculates the total depreciation amount as follows:-
Depreciation amount = Fixed depreciation + (variable depreciation * shift
factor)