Equivalent production is a measure that applies a percentage-of-completion factor to partially completed units to compute the equivalent number of whole units produced in an accounting period for each type of input. Equivalent units are computed from (1) units in the beginning work in process inventory and their percentage of completion, (2) units started and completed during the period, and (3) units in the ending work in process inventory and their percentage of completion. The computation of equivalent units differs depending on whether the FIFO method or the average costing method is used.