multi shift option

hi,

this is our client requirements for Country India. As per law we should claim different depreciation rates as per shifts the asset utilized. The same asset may be used in 3shifts for some days in a period and 2 shifts or single shifts for the balance. As per the shifts it worked rate of depreciation will change. Any new Depreciation Keys are necessary?

How can we avail this option for our Assets?

Another aspect is that how the user will feed the no. of shifts a machine worked during a period.

could u help me how to resolve this rquirement. and also give the any configaration related to this issue