Need a depreciation method where an asset is to be depreciated using reducing balance method calcula

Two clarification needed urgent basis.

1.We need a depreciation method for an asset is to be depreciated using reducing balance method calculated based on the Net Book Value of the asset.

2.We require the asset to depreciate based on remaining periods/months of the asset

It will be helpful incase clarification is email ed across to Nagaraju_Boddu@satyam.com.

Thanks,

Nagaraju

cell:+61469099251