Solutions-HW2-Fall17(1).pdf - MGMT361 Fall 2017 Homework 2...

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Stage 1 Question 1 (3+4+4+3 = 14 points) Consider the following process. The processing time (sec/unit) is given for each worker. a) Calculate the following design parameters for this process: Stage 2 M3 40 M1 90 M2 60 MGMT361 Fall 2017 Homework 2 Due Monday September 18 Section time: . Name: . Designed CT for Stage 1 36 sec / unit Designed CT for Stage 2 40 sec / unit Bottleneck Stage: Stage 2 Process Designed CT 40 sec / unit Process Capacity 90 units / hour
b) Customers arrive to this process in the following way: two customers arrive at the same time every 90 sec starting at time 0, one goes to M1, another to M2. Draw the Gantt chart. Each grid in the following chart represents 10 sec. You can extend the below chart as needed. c) Under the arrival schedule given in (b), calculate the following run-time parameters: d) Use the total WIP and the flow time calculated in (c), then apply the Little’s formula to get the flow rate and the actual CT . Underline the correct answer: a. The flow rate calculated using the Little’s law is the same /more/less than the flow rate calculated in (c) using the Gantt chart . [Flow rate = WIP/Flow Time=8/3:120=1/45 units/sec=80 units hr] b. The