APC is acquisition and production cost.
 
As a result of the integration in the R/3 System, Asset Accounting (FI-AA) transfers data directly to and from other R/3 components. For example, it is possible to post from the Materials Management (MM) component directly to FI-AA. When an asset is purchased or produced in-house, you can directly post the invoice receipt or goods receipt, or the withdrawal from the warehouse, to assets in the Asset Accounting component. At the same time, you can pass on depreciation and interest directly to the Financial Accounting (FI) and Controlling (CO) components. From the Plant Maintenance (PM) component, you can settle maintenance activities that require capitalization to assets

If you post to an asset when entering a purchase requisition or an outline agreement, the system checks, with reference to the planned delivery date, whether the fixed asset actually exists and whether you can post to it. The same checks are carried out if you post to a fixed asset when entering a purchase order. Moreover, the system ensures that you do not exceed the upper limit for low-value assets. You can still change the asset, for which account assignment is to be performed, until receipt of the first goods or invoice for a purchase order.
 
If you want to carry out account assignment to assets when creating purchase orders, purchase requisitions and outline agreements, the account entered in Financial Accounting for "Acquisition and production costs" must be assigned to a field status group that allows entries in the field groups "asset number/sub-number," "transaction type," and "quantity."