A process includes 9 tasks and there are 3 workers. Each task can be assigned to only one worker and each worker must be assigned consecutive tasks. The time to complete tasks 1 to 9( in seconds) are as follows: 45 55 15 25 50 5 30 95 50
What is the capacity of this process in units per hour?

24.8 per hour

Explanation:

There are 3 workers and hence are three workstations. Consecutive activities are assigned to each workstation such that workload is as uniform as possible

Hence the time in each workstation (WS) is,  

WS1 = 45+55+15 = 115 seconds

WS2 = 25+50+5+30 = 110 seconds

WS3 = 95+50 = 145 seconds

Workstation 3 has the highest processing time and hence is the bottleneck and determines the capacity of the process

Therefore capacity = 1/145 per second = 3600/145 per hour = 24.8 per hour

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