Operations Management
11th Edition
ISBN: 9780132921145
Author: Jay Heizer
Publisher: PEARSON
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Textbook Question
Chapter 9, Problem 16P
Tailwind, Inc., produces high-quality but expensive training shoes for runners. The Tailwind shoe, which sells for $210, contains both gas- and liquid-filled compartments to provide more stability and better protection against knee, foot, and back injuries. Manufacturing the shoes requires 10 separate tasks. There are 40D minutes available for manufacturing the shoes in the plant each day. Daily demand is 60. The information for the tasks is as follows:
| TASK | PERFORMANCE TIME (MIN) | TASK MUST FOLLOW TASK LISTED BELOW |
| A | 1 | − |
| B | 3 | A |
| C | 2 | B |
| D | 4 | B |
| E | 1 | C, D |
| F | 3 | A |
| G | 2 | F |
| H | 5 | G |
| I | 1 | E, H |
| J | 3 | I |
- a. Draw the precedence diagram.
- b. Assign tasks to the minimum feasible number of workstations according to the “ranked positioned weight” decision rule.
- c. What is the efficiency of the process you completed in (b)?
- d. What is the idle time per cycle?
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For the purpose of process analysis, which of the following measures would be considered an appropriate flow unit for analyzing the main operation of a local accounting firm? Instructions: You may select more than one answer.
a. Number of accountants working each week
b. Number of tax returns completed each week
c. Number of customers with past-due invoices
d. Number of reams of paper received from suppliers
4. Based on the data provided in Table 2.5, what is the flow rate of callers from 8:00 a.m. to 8:20 a.m.?
TABLE 2.5 Time Stamps of the Eight Callers Who Called from 8:00 a.m. to 8:20 a.m. to the Reservation Desk of a Ferry Service
Caller
Time In
Time Out
1
8:01
8:05
2
3
4
5
6
8:02
8:07
8:06
8:08
8:09
8:12
8:10
8:15
8:12
8:20
7
8:16
8:19
8
8:17
8:19
5. Based on the data provided in Table 2.5, what is the flow time of callers from 8:00 a.m. to 8:20 a.m.?
6. Based on the data provided in Table 2.6, what is the flow rate of customers from 9:00 a.m. to 10:00 a.m.?
TABLE 2.6 Time Stamps of 10 Customers Who Visited a Local Bank Branch from 9:00 a.m. to 10:00 a.m.
Customer
1
2
3
4
5
6
7
8
9
10
Time In
Time Out
9:01
9:07
9:06
9:21
9:08
9:20
9:14
9:19
9:20
9:28
9:26
9:33
9:31
9:39
9:40
9:46
9:44
9:59
9:53
9:57
7. Based on the data provided in Table 2.6, what is the flow time of customers from 9:00 a.m. to 10:00 a.m.?
Chapter 9 Solutions
Operations Management
Ch. 9 - Prob. 1DQCh. 9 - Prob. 2DQCh. 9 - Prob. 3DQCh. 9 - Prob. 4DQCh. 9 - Prob. 5DQCh. 9 - Prob. 6DQCh. 9 - Prob. 7DQCh. 9 - Prob. 8DQCh. 9 - What are the requirements for a focused work...Ch. 9 - Prob. 10DQ
Ch. 9 - Prob. 11DQCh. 9 - Prob. 12DQCh. 9 - Prob. 13DQCh. 9 - Prob. 14DQCh. 9 - Prob. 15DQCh. 9 - Prob. 16DQCh. 9 - Explain the concept of cross-docking.Ch. 9 - What is a heuristic? Name several that can be used...Ch. 9 - Prob. 1PCh. 9 - Prob. 2PCh. 9 - Three departmentsmilling (M), drilling (D), and...Ch. 9 - Roy Creasey Enterprises, a machine shop, is...Ch. 9 - Prob. 5PCh. 9 - Prob. 6PCh. 9 - Prob. 7PCh. 9 - Prob. 8PCh. 9 - Six processes are to be laid out in six areas...Ch. 9 - After an extensive product analysis using group...Ch. 9 - Stanford Rosenberg Computing wants to establish an...Ch. 9 - Illinois Furniture, Inc., produces all types of...Ch. 9 - Sue Helms Appliances wants to establish an...Ch. 9 - The Action Toy Company has decided to manufacture...Ch. 9 - The following table details the tasks required for...Ch. 9 - Tailwind, Inc., produces high-quality but...Ch. 9 - Prob. 17PCh. 9 - Because of the expected high demand for Mach 10,...Ch. 9 - Prob. 19PCh. 9 - Suppose production requirements in Solved Problem...Ch. 9 - The preinduction physical examination given by the...Ch. 9 - Samuel Smith's company wants to establish an...Ch. 9 - As the Cottrell Bicycle Co. of St. Louis completes...Ch. 9 - Prob. 1CSCh. 9 - Prob. 2CSCh. 9 - Prob. 3CSCh. 9 - Prob. 4CSCh. 9 - Prob. 1.1VCCh. 9 - Prob. 1.2VCCh. 9 - Prob. 1.3VCCh. 9 - Prob. 1.4VCCh. 9 - Prob. 1.5VCCh. 9 - Prob. 2.1VCCh. 9 - Prob. 2.2VCCh. 9 - Prob. 2.3VC
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