Percentage of completion (PoC) is an accounting method of work-in-progress evaluation, for recording long-term contracts. For such tasks, this is the only method authorized by the International Financial Reporting Standards (IFRS)[citation needed].
Revenues and gross profit are recognized each period based on the construction progress-in other words, the percentage of completion. construction costs plus gross profit earned to date are accumulated in an inventory account (construction in process, also called construction in progress), and progress billings are accumulated in a contra inventory account (billing on construction in process).
Although the formula for recognizing income in the current period can vary, a widely accepted one is as follows:

where... the number of periods lapsed since the inception of the contract.
the expected length of the contract. the current period.

若能收集到该词条相关资料的跟帖者给予奖励，根据收集资料的水平给予5～100不等的论坛币，当然也可以谈谈自己的看法、应用背景，相关软件知识，上传资料等等都可以。请大家尽量不要复制一些搜索引擎很容易收集到的资料。

     我每天都会发送不等数量的词条，所以诚邀不同统计背景的各路大侠给予评论。

     欢迎大家多多跟帖！要数量也要质量哟