A work center has five jobs assigned to it. They are labeled, in the order of their arrival in the shop, as jobs A, B, C, D, and E. The work center may work on only one job at a time and must complete any job it starts before starting another job. Job A has a processing time of 6 days and is due to the customer in 9 days. Job B has a processing time of 2 days and is due in 16 days. Job C has a processing time of 4 days and is due in 10 days. Job D has a processing time of 3 days and is due in 7 days. Job E has a processing time of 5 days and is due in 12 days. Using the slack time remaining priority rule, in what order should these jobs be undertaken?

Question

Fill in the blank(s) with the appropriate word(s).

Answer 1

A-D-C-E-B

See Example 22.1, STR Rule. Slack time remaining for Job A = 9 - 6 = 3; Job B, 16 - 2 = 14; Job C, 10 - 4 = 6; Job D, 7 - 3 = 4; Job E, 12 - 5 = 7. Starting with the least slack time, A (3 days) is first, D (4 days) is second, C (6 days) is third, E (7 days) is fourth, and B (14 days) is last. A-D-C-E-B is the preferred sequence using the STR rule.