The simulation uses a straight-line 15 year depreciation schedule. This means that a machine's value is reduced by 1/15 each year.
For example, a machine that has a capacity and automation cost of $15,000,000 will have a value of $14,000,000 the year after it is purchased.
$15,000,000 * (1/15) = $14,000,000
Reports are written at the end of the year, therefore the value of new capacity and automation will already be depreciated the first time they are listed in a report.