A manufacturing routing defines the path an item follows through production. It identifies the operations to be performed and where they are performed. Therefore, a work center is a required routing data element. Queue time may be used in scheduling or lead-time calculations, order quantity is not a routing element, and efficiency factor is a work-center/capacity parameter rather than the required routing identifier.
Exact extract: “The time material spends waiting to be processed at a work centre or resource; in effect the difference between when the operation should start and when it actually starts. Queue time may only be calculated during the scheduling process or averaged using historical data.”
The practice material also confirms that routing is tied to operations and work centers: “Existing queue time can be eliminated if a job’s priority is high enough to bypass all other jobs waiting at the work center.”
Therefore, the required routing data element among the options is work center .
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