OPERATIONS MANAGEMENT(LL)(FD)
13th Edition
ISBN: 9781260698824
Author: Stevenson
Publisher: MCG
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Chapter 16, Problem 8P
The following table shows orders to be processed at a machine shop as of 8:00 a.m. Monday. The jobs have different operations they must go through. Processing times are in days. Jobs are listed in order of arrival.
a. Determine the processing sequence at the first work center using each of these rules: (1) FCFS, (2) S/O.
b. Compute the effectiveness of each rule using each of these measures: (1) average flow time, (2) average number of jobs at the work center.
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Students have asked these similar questions
A bank receives loan applications from 6 customers a day. The bank has promised customers that applications will be processed in the order they are received. The table below shows the applications in the order they were received, the processing time for each loan application, and the due date that customers need to hear about their application status:
Customer
Processing time (days)
Due date (days)
A
9
13
B
11
18
C
8
11
D
7
13
E
10
22
F
12
28
Average flow time
days
Average tardiness
days
Average number of jobs
applications
The table below shows the time stamps of 10 customers who visited a local bank branch from 9:00 a.m. to 9:45 a.m. What is the flow
time of customers?
Customer
1
2
3
4
5
6
7
8
9
10
Time in
9:2
9:5
9:6
9:8
9:8
9:10
9:12
9:15
9:18
9:19
Time out
9:7
9:10
9:17
9:23
9:36
9:21
9:41
9:41
9:28
9:42
Instruction: Round your answer to 1 decimal place.
Flow time of customers
3.5 minutes
b) A company receives parts from suppliers to be used in its manufacturing departments.
The quality control department must perform two operations when shipments are
received:
Operation A – draw a random sample, package, and deliver to testing; and
Operation B – test the materials and issue a disposition report.
There are currently six shipments waiting to be processed. The time estimates for
processing these six shipments through quality control are given in the table below.
Shipment
Operation A (hours)
Operation B (hours)
A
1.5
1.0
В
1.1
2.7
1.2
1.4
D
0.7
1.6
E
1.6
1.5
F
1.9
2.9
Use Johnson's Rule to set the sequence of processing the shipments through
Quality Control.
i.
ii.
How much total time is required to process all the six shipments through Quality
Control? Show all times on a Gantt Chart.
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Chapter 16 Solutions
OPERATIONS MANAGEMENT(LL)(FD)
Ch. 16 - Why is scheduling fairly simple for repetitive...Ch. 16 - Prob. 2DRQCh. 16 - What are Gantt charts? How are they used in...Ch. 16 - Prob. 4DRQCh. 16 - Briefly describe each of these priority rules: a....Ch. 16 - Why are priority rules needed?Ch. 16 - What problems not generally found in manufacturing...Ch. 16 - Explain forward and backward schedulings and each...Ch. 16 - Prob. 9DRQCh. 16 - Prob. 10DRQ
Ch. 16 - Prob. 11DRQCh. 16 - What general trade-offs are involved in sequencing...Ch. 16 - Prob. 2TSCh. 16 - Prob. 3TSCh. 16 - One approach that can be effective in reducing the...Ch. 16 - Doctors and dentists offices frequently schedule...Ch. 16 - Prob. 3CTECh. 16 - Use the assignment method to determine the best...Ch. 16 - Rework Problem 1, treating the numbers in the...Ch. 16 - Assign trucks to delivery routes so that total...Ch. 16 - Develop an assignment plan that will minimize...Ch. 16 - Use the assignment method to obtain a plan that...Ch. 16 - The following table contains information...Ch. 16 - Using the information presented in the following...Ch. 16 - The following table shows orders to be processed...Ch. 16 - A wholesale grocery distribution center uses a...Ch. 16 - The times required to complete each of eight jobs...Ch. 16 - Prob. 11PCh. 16 - A shoe repair operation uses a two-step sequence...Ch. 16 - The following schedule was prepared by the...Ch. 16 - The production manager must determine the...Ch. 16 - A foreman has determined processing times at a...Ch. 16 - Given the information in the following table,...Ch. 16 - Given the following information on job times and...Ch. 16 - Prob. 18PCh. 16 - The following table contains order-dependent setup...Ch. 16 - The following table contains order-dependent setup...Ch. 16 - Prob. 21PCh. 16 - Given this information on planned and actual...Ch. 16 - Given the following data on inputs and outputs at...Ch. 16 - Determine the minimum number of workers needed,...Ch. 16 - Determine the minimum number of workers needed,...Ch. 16 - Determine the minimum number of workers needed,...Ch. 16 - Prob. 1CQ
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