capital asset sales process configuration

my client requirement is

"If asset is unused then excise is passed as it is and In case of asset is used then excise applicable on depreciation basis is 2.5%per quarter with straight line method for calculating excise".

this is as per Excise laws in India.

or if the treatement for Capital Asset is different please let me know the process.

My plan is

create a material as service item and charge excise and taxes manually for order related billing , so please corrrect if i am wrong.