Asset Accounting Issue

we have configured ZSLM(Straight Line Depreciation)  Dep Key for all Assets now there is one new Requirement have come from the client

1. If the machine or Vehicle has sent for Servicing for a week or 15 days than the depreciation must not calculate for this days
2. if the machine is working  on multiple shift so depending on the shift timings they need to calculate dep

now can we use the same Dep key or we need to create separate keys