Question

Sunny Park Tailors has been asked to make three different types of wedding suits for separate customers. The table below highlights the time taken in hours for cutting and sewing (process 1) and delivery (process 2) of each of the suits. Times Taken for Different Activities (hours) Suit Cut and Sew Deliver 4 Assume that orders for suits have been listed in the above table in the order in which they were received.

Answer 1

Johnson's rule

The minimum time is for suit 2 (2 hours) and it is in process 2, so schedule it to the extreme right: _ , _ , 2

The next minimum time is for suit 1 (3 hours) and it is in process 1, so schedule it to the extreme right: 1 , _ , 2

So, the optimal sequence in 1-3-2

The total length of time taken = 19 hours

FCFS rule

Sequence is 1-2-3

14 Cut& Sew 14

The total length of time taken = 22 hours