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

1 7 2

2 4 3

3 5 6

???????????????

For the schedule developed using the? Johnson's rule, the total length of time taken to complete the three suits? (including delivery)? =

Of the two developed? schedules, which rule gets the schedule finished sooner.??????????????????????????

Answer 1

As per Johnson's rule, follow the following steps to determine the sequence:

1. Step 1: Choose the suit with least time in either of the 2 stages of processes. That's Suit 1 with least time as 2 hours in stage 2 (2nd process). Since, the least time is in stage 2, place Suit 1 at the last.

2. Step 2: Do the same as in step 1 and look for the suit with least time in either stages. That's Suit 2 with 3 hours in stage 2. Since, the least time is in stage 2, place Suit 2 just before Suit 1, that is in middle.

3. Step 3: Place the last suit left in the front.

So, as per Johnson's Rule, sequence should be Suit 3 --> Suit 2 --> Suit 1.

Total time taken as per the above rule is shown below:

So, time taken as per Johnson' Rule = 18 hours (as shown above)

For developing second schedule, please provide which other rule is to be used.

However, I will assume its FCFS (First Come First Serve). Based on FCFS, the time taken will be:

So, time taken as per FCFS rule = 22 hours (as shown above)

So, schedule developed as per Johnson's Rule gets finished sooner!