In a three stage production process which is operated as a worker paced line. Process is experienceing severe quality problems related to insufficiently trained workers. Specifically 20% of the parts going through operation 1 are badly processed by the operator. Rather than wasting the unit it is moved to a highly skilled rework operator who can correct the mistake and finish up the unit completely within 15 min. The same problem occurs at station2 where 10% of the parts are badly processed requring 10 minutes of rework. Station 3 also has a 10% ratio of badly processed parts each of them requiring 5 minutes by the rework operator.

a) what is the utilizatio of station 2 if work is released into the process at a rate of 5 units per hour?

b) Where in the process is the bottleneck?

c) What is the process capacity?