We have a particular requirement for Brussels region we want the depreciation of asset to be calcula

Requirement

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Use
WDV method with defined rates until the asset is depreciation half to the cost;
after that SLM method will be used.

Example

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Asset
cost =100

WDV
will be for 1.75 months and then it will be SLM for remaining period

Formula
used = DECODE(SIGN(<Remaining Life 1> - 3.25), 1, 0.4, 0, 0.4, -1, 0.2)

Solutions tried

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I
tried three different setups of depreciation calendar, prorate convention and
divide depreciation but the results in every setup is same

1.
Depreciation calendar = Daily , Prorate Convention = Daily, Divide depreciation
= Daily

2.
Depreciation calendar = Monthly , Prorate Convention = Daily, Divide
depreciation = Daily

3.
Depreciation calendar = Monthly , Prorate Convention = Monthly, Divide
depreciation = Daily