Answer-HW2-Spring17 - MGMT361 Spring 2017 Homework 2 Due...

MGMT361 Spring 2017 Homework 2
Due Wednesday February 8
Section time: .
Name: .
Question 1 (3+4+4 = 11 points)
Consider the following process. The capacity (units/hour) is given for each worker.
a) Calculate the following design parameters for this process:
M3
90
Stage 1 Stage 2
M1
60
M2
36
Cycle time (CT) for Stage 1
40 sec / unit
CT for Stage 2
37.5 sec / unit
Bottleneck
Stage: 2
Process Designed CT
40 sec / unit
Process Capacity
90 units / hour

b) Customers arrive to this process in the following way: Every 60 sec one customer arrives to M1:
at time 0, 60sec , 120sec, 180sec, … Every 120 sec one customer arrives to M2: at time 0, 120sec,
240sec, 360sec,… Draw the Gantt chart from time 0 to time 300 sec. 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:
Demand Rate
90 units/hour
Flow Rate
90 units/hour
Actual Cycle Time
40 sec/unit
WIP for M1
1 units
WIP for M2
0.83 units
WIP for Buffer
0.17 units
WIP for M3
1 units
Total
3 units
M1
M2
Buffer
M3