Difference between Unplanned depreciation and Manual depreciation

First of all an asset will have depreciation keys.

These depreciation keys have the control for calculating the automatic depreciation.

If you maintain a normal depreciation key, this will automatically forecast the depreciation for the open FYs.

Apart from the above planned ordinary depreciation, you can post unplanned depreciation also, if any unforeseen conditions happen.

Example:

 

On 31.08.2009 your asset's NBV is 5000$ (after august depreciation run also), but if you feel that (client) this asset's value is further down according to the current market value, you can pass a unplanned depreciation (ABAA) for an amount of 100$. So with this transaction your asset's NBV as on 31.08.2009 will become 4900$.

By passing ABAA, system will not post any accounting doc, since it creates an AA internal document. So you need to do a repeat depreciation run for the august period, then the system will check the asset for any unposted planned/unplanned depreciations to it. So at this point system will pass that amount to accounting.

But where as manual depreciation is concerned...

You cannot post any unplanned depreciation to an asset, which is having depreciation key that does not forecast planned depreciation values for the open FY.

Depreciation key MANU is the standard depreciation key, which will not forecast any planned depreciation to it.