Practice question 4
The production engineer at Mthembu Steels company prefers to sequence jobs based on the
shortest process time (SPT). Four jobs with different process times (in days) arrive at a fourmachine flow shop in the sequence shown in Table Q1.
Table Q1: Job processing time (in days)
Processing Times (Days)
Job
Machine A
Machine B
Machine C
Machine D
1
2
1
4
5
2
1
3
2
2
3
3
6
1
3
4
2
5
2
4
Determine the make-span when using the production engineer's preferred method
2024 test question
STP = 2,1,3,4