Explain the three categories of criteria used to evaluate job sequencing performance. For each category, provide two example measures
1 . Process-focused performance criteria: They pertain only to information about the start and end times of jobs and focus on shop performance. Two common measures are flow time and makespan. Flow time is the amount of time a job spent in the shop or factory. Makespan is the time needed to process a given set of jobs.
2 . Customer-focused due-date criteria: They pertain to customers' required due dates or internally determined shipping dates. Two common measures are lateness and tardiness. Lateness is the difference between the completion time and the due date (either positive or negative). Tardiness is the amount of time by which the completion time exceeds the due date.
3 . Cost-based criteria: Typical costs include inventory, changeover (setup), processing or run, and material handling.
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