A job shop has $$6$$ orders to be completed by a single turning center. The processing times and due dates are as follows:

Assume that all orders are ready for processing. Give a production schedule that minimizes the average flow time. Compare this schedule with one that minimizes tardiness (lateness).

A job shop incurs a cost of Rs.$$60$$/- per day for each day a job is in the shop. At the beginning of a month there are five jobs in the shop with the following data:

Which schedule will minimize the total cost?
What is the minimum total cost?
Which jobs (if any) fail to meet their due dates?

Service workshop has four jobs on hand to be processed. The date and processing time for each of the jobs are given below

Considering mean lateness and mean flow time, evaluate the shortest-time rule and least-slack rule and recommend the desirable rule.