Question

Question 6 0.25 pts Mr. K's Hair Salon (Q1-Q10) Mr. K's is a hair salon whose service process includes six activities conducted in the sequence described below. (The time required for each activity is shown in parentheses): Activity 1: Welcome guests and serve herb tea. (10 minutes) Activity 2: Offer styling suggestions. (15 minutes) Activity 3: Condition hair. (10 minutes) Activity 4: Do the hair. (30 minutes) Activity 5: Wash hair. (10 minutes) Activity 6: Check out the guest. (5 minutes) Three servers (S1, S2, and S3) offer the services in a worker-paced line. The assignment of tasks to servers is as the following: S1: Activity 1 and Activity 2. S2: Activity 3 and Activity 4. S3: Activity 5 and Activity 6. Q6) Now assume that the demand has surged to 6 customers per hour. What is the average labor utilization (in %) of the servers?

Answer 1

Answer 6: Average labor utilization= 66.67%

Explanation: Bottleneck is S2 with cycle time of 40 mins

Idle time= bottleneck time- process time

worker	time	Idle time
S1	25	15
S2	40	0
S3	15	25

Total labor content= sum of all process times= 25+40+15= 80 mins

• Average labor utilization = total labour content / (labour content + total idle time)

Average labour utilization= 80/(80+40)= 0.6667 or 66.67%

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