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A production manager must determine the processing sequence for seven jobs through the grinding and de-burring departments. The same sequence will be followed in each
A production manager must determine the processing sequence for seven jobs through the grinding and de-burring departments. The same sequence will be followed in each department. The manager's goal is to move the jobs through the two departments as quickly as possible. The site supervisor of the grinding department wants the SPT rule to be used to minimize the work-in-process inventory in the department. PROCESSING TIME (HOURS) Job Grinding Deburring 0 0 0 A N N W a. Prepare a schedule using the SPT priority rule for the grinding department (using the grinding times). O C-B-A-D-G-F-E O D-C-B-E-F-G-A O A-B-C-D-E-F-G O G-D-E-A-B-C-F b-1. What is the total flow time in the grinding department for the SPT sequence? Grinding total flow time hours b-2. What is the make-span for the seven jobs in both the grinding and de-burring departments (using the sequence found in part a)? Make-span hours c-1. Determine a sequence that will minimize the make-span in both departments. O C-B-A-F-E-D-G O C-D-F-B-A-G-E O A-B-C-D-E-F-G O G-D-E-A-B-C-F
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