Only need help with 5-9!!!!

BASIC PROCESS FLOW ANALYSIS A diagram of a service process is given below. The process runs on the J.I.T. principle (in other words customers cannot leave the waiting room and start through the process at Operation 1 more often than the process can finish them. Note that the abbreviation custs stands for customers. Clerk A Clerk B Clerk Clerk D A OP 1 OP 2 OP 3 OP 4 Waitin g Room 20 custs/hour WIP 1 15 custs/hour WIP 2 12 custs/hour WIP 3 30 custs/hour 5. What is the average overall labor utilization for the 4 clerks assuming that customers arrive every 6 minutes? a. 6. Assuming the same conditions as held in sub-problem 4. What is the throughput of the process? a. 7. Assume that instead of JIT, you use a material release policy in which each operation operates as quickly as it can. In this case, what is the average labor utilization for the 4 clerks assuming that customers arrive every 4 minutes? 8. To increase the capacity of the process, to which operation would you add an additional clerk? a. OP 3 9. If a clerk is added to increase the capacity of the process (you can assume the new clerk is as efficient as the old clerks at any of the 4 operations), what is the new process capacity. 15 custs/hour a. 1. What is the operational cycle time of OP 2? 15 customers/hour b. 4 min/customer a. 2. Identify the bottleneck a. Clerk C (OP 3) 3. What is the process capacity? a. 12 customers/hour b. 5 min/customer a. 4. What is the utilization of Clerk D assuming that customers arrive every 6 minutes? 10 customers/hour b. 60 min/ (6min/customer) c. 30 customers/hour d. Only seeing 10 customers, 10 out of the potential 30 = 10/30 = 33.33%