The three-station work cell has a product that must go through one of the two ma

Question

The three-station work cell has a product that must go through one of the two machines at station 1 (they are parallel) before proceeding to station 2.

Station 1 Machine A Capacity: 20 units/hr

Station 1 Machine B Capacity: 20 units/hr

Station 2 Capacity: 2 units/hour

Station 3 Capacity: 10 units/hour

A. The bottleneck time of the system is?

B. which station is the bottleneck station?

C. The throughput time is? (in minutes)

D. If the firm operates 8 hours per day, 5 days per week, the weekly capacity of this work cell is? (in units)

Explanation / Answer

Ans B. The bottleneck station is station 2, producing 2 units/ hour.

A. Bottleneck time of the system

For that find out the time required to produce one unit at all the three stations.

Station 1 - either through Machine A or Machine B, 60 /20 minutes i.e. 3 minutes

Station 2 - 60 /2 minutes = 30 minutes

Station 3- 60/10 minutes = 6 minutes.

So the bottleneck time is 30 minutes (at station 2)

C. The throughput time is the total time incurred at each station = 3 + 30 + 6 = 39 minutes

D. firm is opearting 8 hours per day and 5 day per week means

8 X 5 = 40 hours per week.

Capacity of the system is determined by the bottleneck station

Capacity = 2 units per hour x 40 hours per week = 80 units per week.

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