Mr. K’s is a very popular hair salon. It offers high‐qualityhairstyling and physical relaxation services at a reasonableprice.
The service process includes five activities that are conductedin the sequence described below. (The time required for eachactivity is shown in parenthesis):
Activity 1: Welcome a guest and offer homemade herb tea. (12minutes)
Activity 2: Wash and condition hair. (15 minutes)
Activity 3: Neck, shoulder, and back stress release massage. (9minutes)
Activity 4: Design the hairstyle and do the hair. (24minutes)
Activity 5: Check out the guest. (6 minutes)
Three workers (S1, S2, and S3) are staffed to this assemblyline, and the assignment of tasks to each worker is:
S1
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