求翻译：We are not aware of any paper dealing with competition at the shop floor production level except possibly the work of Hain and Mitra (2004), where each manufacturer subcontracts a single job to a third party who is committed to processing jobs in nondecreasing order of processing times (or shortest processing time(SPT)是什么意思？

待解决 悬赏分：1 - 离问题结束还有