Completion factor.
(3) Completion factor. To compute a contract's completion factor (as described in 1.460-4(b)(5)), the related party must take into account the fair market value of the taxpayer's activity that is incident to or necessary for the performance of the related party's long-term contract when the related party incurs the liability to the taxpayer for the activity, rather than when the taxpayer incurs the costs to perform the activity.