It's just for the books. Has nothing to do with the economic or usability depreciation. In theory it should reasonably be indicative of useful life, but they just use standard numbers.
The accounting dept shouldn't care either way 3 or 5. Makes no difference to them. They will tell management that they want to increase expenses and then have dead assets in 3 years vs 5 and management will say don't do it and accounting will say ok. People in general think accountants have way too much control, blaming the bean counters lol, but they pretty much just report on and record the actions of management. And advise if management will listen.
Edited by vwinter - 8/23/13 at 9:01am