A product requires the following tasks to make it on an assembly line. Assume 7.6 hours per workday and 5 workdays per week. $\begin{array}{crc}\text { Task } & \text { Time (n minutes) } & \text { Predecessor(s) } \\ \text { A } & 10 & \text { none } \\ \text { B } & 14 & \text { A } \\ \text { C } & 12 & \text { none } \\ \text { D } & 8 & \text { none } \\ \text { E } & 11 & \text { C } \\ \text { F } & 17 & \text { C, D } \\ \text { G } & 20 & \text { B } \\ \text { H } & 9 & \text { E } \\ \text { I } & 13 & \text { D } \\ \text { J } & 15 & \text { G, H } \\ \text { K } & 17 & \text { H, I } \\ \text { L } & 8 & \text { J } \\ \text { M } & 10 & \text { I } \\ \text { N } & 15 & \text { K, L, M } \end{array}$ a.Using only the information given, what would be the maximum output per day that can be achieved? b.Assume that the activities have been assigned to five workstations. What is the line efficiency for a cycle time of 40 seconds?

a.The minimum cycle time is the maximum

The twelve tasks necessary to assemble a food blender are listed below. The time to perform each task and the tasks that must immediately precede are also listed. 200 blenders are needed per hour and 50 minutes per hour are productive: $\begin{array}{ccc|ccc}\text { Task }&\text {Time (in minutes)}&\text { Predecessors }&\text { Task }&\text {Time (in minutes)}&\text { Predecessors }\\ \hline\text { A } & 0.20 & \text { none } & \text { G } & 0.08 & \text { E, F } \\ \text { B } & 0.05 & \text { none } & \text { H } & 0.12 & \text { none } \\ \text { C } & 0.15 & \text { none } & \text { I } & 0.05 & \text { none } \\ \text { D } & 0.06 & \text { none } & \text { J } & 0.12 & \text { H, I, G } \\ \text { E } & 0.03 & \text { A, B } & \text { K } & 0.15 & \text { J } \\ \text { F } & 0.16 & \text { C, D } & \text { L } & 0.08 & \text { K } \end{array}$ a.Compute the cycle time per unit in minutes. b.Compute the minimum number of workstations required. c.Use the longest-task-time heuristic to balance the assembly line. d.Compute the efficiency of your assembly line.

a.Cycle time = 50/200 = 0.25 minutes per

The eleven tasks necessary to assemble an MP3 player along with their time (in seconds) and immediate predecessor(s) is given below: $\begin{array}{ccc}\text { Task } & \text { Time (n minutes) } & \text { Predecessor(s) } \\ \text { A } & 40 & \text { none } \\ \text { B } & 15 & \text { none } \\ \text { C } & 35 & \text { none } \\ \text { D } & 12 & \text { A, B } \\ \text { E } & 27 & \text { B, C } \\ \text { F } & 29 & \text { D } \\ \text { G } & 60 & \text { D, E } \\ \text { H } & 30 & \text { E } \\ \text { I } & 14 & \text { F, G } \\ \text { J } & 22 & \text { G, H } \\ \text { K } & 43 & \text { I, J }\\ \text { Total }&327 \end{array}$ The company wants to produce 600 units in a 9-hour day. -The cycle time is _____ seconds.

A) 45 B) 54 C) 63 D) 71 A) 45 B) 54 C) 63 D) 71

Exam 8: Facility and Work Designs

A small electronics company assembles microchips for use in computers, printers and fax machines. They want to set up an assembly line to make their operation more efficient and plan to use line balancing with the longest-task-time heuristic. The demand for microchips is 70 per hour, and the productive time per hour is 52 minutes. The following table provides details on their operation. Task Time (n minutes) Predecessor(s) A 0.54 none B 0.34 A C 0.11 A D 0.09 A E 0.43 B, C F 0.22 D G 0.62 E H 0.35 F, G I 0.21 H J 0.57 H K 0.33 I. J a.What is the cycle time? b.What is the theoretical minimum number of workstations? c.What tasks go into the first workstation? d.How many workstations are needed for the entire line? e.What is the assembly-line efficiency?

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Question 1

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a.Cycle time = 52 min per hr./70 units per hr. = 0.742 minutes/unit
b.Sum of task times = 3.81 minutes
Theoretical minimum number of workstations
= [(3.81 min/unit)[(70 units/hour)/(52 min/hour)]] = 5.134 = 6 workstations
c.Tasks A ,C, and D
d. $\begin{array}{l}7 \text { workstations }\\\begin{array} { l c c c } & \text { Tasks } & \text { Productive Time } & \text { Idle Time } \\\text { Station 1 } & \text { A, C } & 0.65 & 0.025 \\\text { Station 2 } & \text { B, D, F } & 0.65 & 0.025 \\\text { Station 3 } & \text { E } & 0.43 & 0.245 \\\text { Station 4 } & \text { G } & 0.62 & 0.055 \\\text { Station 5 } & \text { H, I } & 0.56 & 0.115 \\\text { Station 6 } & \text { J } & 0.57 & 0.105 \\\text { Station 7 } & \text { K } & \underline { 0.33 } & \underline { 0.345 } \\\text { Total } & & 3.81 & 0.915\end{array}\end{array}$
e.Efficiency = $\Sigma$ t/(N * CT) = 3.81/(7 * 0.742) = 3.81/5.18 = 0.735 = 73.552%

Which one of the following statements is TRUE regarding the BankUSA: Cash Movement case study?

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Question 2

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Because of precedence relationships in a network, assembly-line efficiencies will generally be very high.

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Question 3

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False

An assembly line with 28 activities is to be balanced. The total amount of time required for all 28 activities is 39 minutes. The longest activity is 2.2 minutes and the shortest is 0.8 minutes. The line will operate for 450 minutes per day. What is the assembly-line efficiency with 11 stations and a product produced every 5 minutes?

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Question 4

Explain the role of ergonomics in job design.

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Question 5

Cycle time in assembly-line balancing is the maximum amount of time it takes to process a part at some workstation along the line.

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Question 6

In a _____ team, members communicate by computer, take turns as leaders, and join and leave the team as necessary.

(Multiple Choice)

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Question 7

Steve, an operations manager at Krypto InfoTech, must set up an assembly line to assemble a computer mouse. The precedent network given below is defined with task times in parentheses and stated in minutes. There are 480 minutes of assembly time per shift and there is one shift. The forecast (output rate) is 60 units per shift. He decides to use the longest/largest-task-time rule to assign tasks to workstations. SHAPE \* MERGEFORMAT $Steve, an operations manager at Krypto InfoTech, must set up an assembly line to assemble a computer mouse. The precedent network given below is defined with task times in parentheses and stated in minutes. There are 480 minutes of assembly time per shift and there is one shift. The forecast (output rate) is 60 units per shift. He decides to use the longest/largest-task-time rule to assign tasks to workstations. SHAPE \* MERGEFORMAT Worksheet for assembly-line balancing problem \begin{array}{|c|c|c|c|} \hline \text { Workstation } & \text { Assigned Tasks } & \text { Total Time } & \text { Idle Time } \\ \hline \text { A } & & & \\ \hline \text { B } & & & \\ \hline \text { C } & & & \\ \hline \text { D } & & & \\ \hline \text { E } & & & \\ \hline \text { F } & & & \\ \hline \end{array} Use the previous assembly-line balancing (ALB) information to answer Questions . -What is the cycle time?$ $Steve, an operations manager at Krypto InfoTech, must set up an assembly line to assemble a computer mouse. The precedent network given below is defined with task times in parentheses and stated in minutes. There are 480 minutes of assembly time per shift and there is one shift. The forecast (output rate) is 60 units per shift. He decides to use the longest/largest-task-time rule to assign tasks to workstations. SHAPE \* MERGEFORMAT Worksheet for assembly-line balancing problem \begin{array}{|c|c|c|c|} \hline \text { Workstation } & \text { Assigned Tasks } & \text { Total Time } & \text { Idle Time } \\ \hline \text { A } & & & \\ \hline \text { B } & & & \\ \hline \text { C } & & & \\ \hline \text { D } & & & \\ \hline \text { E } & & & \\ \hline \text { F } & & & \\ \hline \end{array} Use the previous assembly-line balancing (ALB) information to answer Questions . -What is the cycle time?$ Worksheet for assembly-line balancing problem Workstation Assigned Tasks Total Time Idle Time A B C D E F Use the previous assembly-line balancing (ALB) information to answer Questions . -What is the cycle time?

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Question 8

A Gallup study showed that workers who are allowed to personalize their workplaces were no more productive than those who are not allowed.

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Question 9

_____ is vertical expansion of job duties to give a worker more responsibility.

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Question 10

The facility layout in a library would most likely be a process layout.

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Question 11

A product requires the following tasks to make it on an assembly line. Assume 7.6 hours per workday and 5 workdays per week. Task Time (n minutes) Predecessor(s) A 10 none B 14 A C 12 none D 8 none E 11 C F 17 C, D G 20 B H 9 E I 13 D J 15 G, H K 17 H, I L 8 J M 10 I N 15 K, L, M a.Using only the information given, what would be the maximum output per day that can be achieved? b.Assume that the activities have been assigned to five workstations. What is the line efficiency for a cycle time of 40 seconds?

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Question 12

Explain the three types of teams effective for job enrichment.

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Question 13

Which of the following statements is NOT true about assembly lines?

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Question 14

Teams are a way of accomplishing job enrichment.

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Question 15

In a product layout, a breakdown of one piece of equipment will not cause the entire process to shut down.

(True/False)

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Question 16

A _____ layout is an arrangement based on the sequence of operations that are performed during the manufacturing of a good or delivery of a service.

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Question 17

The twelve tasks necessary to assemble a food blender are listed below. The time to perform each task and the tasks that must immediately precede are also listed. 200 blenders are needed per hour and 50 minutes per hour are productive: Task Time (in minutes) Predecessors Task Time (in minutes) Predecessors A 0.20 none G 0.08 E, F B 0.05 none H 0.12 none C 0.15 none I 0.05 none D 0.06 none J 0.12 H, I, G E 0.03 A, B K 0.15 J F 0.16 C, D L 0.08 K a.Compute the cycle time per unit in minutes. b.Compute the minimum number of workstations required. c.Use the longest-task-time heuristic to balance the assembly line. d.Compute the efficiency of your assembly line.

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Question 18

Describe approaches used for process layout design.

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Question 19

The eleven tasks necessary to assemble an MP3 player along with their time (in seconds) and immediate predecessor(s) is given below: Task Time (n minutes) Predecessor(s) A 40 none B 15 none C 35 none D 12 A, B E 27 B, C F 29 D G 60 D, E H 30 E I 14 F, G J 22 G, H K 43 I, J Total 327 The company wants to produce 600 units in a 9-hour day. -The cycle time is _____ seconds.

(Multiple Choice)

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Question 20

Showing 1 - 20 of 92

Which one of the following statements is TRUE regarding the BankUSA: Cash Movement case study?

Because of precedence relationships in a network, assembly-line efficiencies will generally be very high.

Explain the role of ergonomics in job design.

Cycle time in assembly-line balancing is the maximum amount of time it takes to process a part at some workstation along the line.

In a _____ team, members communicate by computer, take turns as leaders, and join and leave the team as necessary.

A Gallup study showed that workers who are allowed to personalize their workplaces were no more productive than those who are not allowed.

_____ is vertical expansion of job duties to give a worker more responsibility.

The facility layout in a library would most likely be a process layout.

Explain the three types of teams effective for job enrichment.

Which of the following statements is NOT true about assembly lines?

Teams are a way of accomplishing job enrichment.

In a product layout, a breakdown of one piece of equipment will not cause the entire process to shut down.

A _____ layout is an arrangement based on the sequence of operations that are performed during the manufacturing of a good or delivery of a service.

Describe approaches used for process layout design.

Goods, Services, and Operations Management

Value Chains

Measuring Performance in Operations

Operations Strategy

Technology and Operations Management

Goods and Service Design

Process Selection, Design, and Analysis

Supply Chain Design

Capacity Management

Forecasting and Demand Planning

Managing Inventories

Resource Management

Operations Scheduling and Sequencing

Quality Management

Appendix: Quality Management

Quality Control and Spc

Appendix: Queuing Analysis

Appendix: Modeling Using Linear Programming

Lean Operating Systems

Appendix: Simulation

Project Management

Appendix: Decision Analysis

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