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Exam 6: Process Selection and Facility Layout

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Question 71

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If a line is balanced with 80 percent efficiency, the "balance delay" will be:

A) 20 percent.
B) 80 percent.
C) 100 percent.
D) unknown, since balance delay is not related to efficiency.
E) depends on the next operation.

F) None of the above
G) C) and D)

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Question 72

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Which of the following is not true about process layouts when they are compared to product layouts?

A) higher in-process inventories
B) lower span of supervision
C) lower rates of output
D) more involved cost accounting
E) lower unit costs

F) B) and E)
G) B) and D)

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Question 73

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Given the following line balance data: $\begin{array} { l c c } \text { Task } & \text { Predecessor } & \text { Time (seconds) } \\\hline \mathrm { t } & \text { none } & 15 \\\mathrm { u } & \mathrm { t } & 14 \\\mathrm { v } & \mathrm { t } & 7 \\\mathrm { w } & \mathrm { u } & 6 \\\mathrm { x } & \mathrm { v } & 8 \\\mathrm { y } & \mathrm { w } , \mathrm { x } & 10 \\\mathrm { z } & \mathrm { y } & 21\end{array}$ What is the maximum possible cycle time?

A company is designing a product layout for a new product. It plans to use this production line eight hours a day in order to meet projected demand of 480 units per day. The tasks necessary to produce this product are: $\begin{array} { l l l } \text { Task } & \text { Time (secs) } & \text { Immediate Predecessor } \\\hline \mathrm { u } & 30 & \text { none } \\\mathrm { v } & 30 & \mathrm { u } \\\mathrm { w } & 6 & \mathrm { u } \\\mathrm { x } & 12 & \mathrm { w } \\\mathrm { y } & 54 & \mathrm { x } \\\mathrm { z } & 30 & \mathrm { v } , \mathrm { y }\end{array}$ If the company wants the output rate to be equal to demand, what is the minimum number of workstations needed?

A company is designing a product layout for a new product. It plans to use this production line eight hours a day in order to meet projected demand of 480 units per day. The tasks necessary to produce this product are: $\begin{array} { l l l } \text { Task } & \text { Time (secs) } & \text { Immediate Predecessor } \\\hline \mathrm { u } & 30 & \text { none } \\\mathrm { v } & 30 & \mathrm { u } \\\mathrm { w } & 6 & \mathrm { u } \\\mathrm { x } & 12 & \mathrm { w } \\\mathrm { y } & 54 & \mathrm { x } \\\mathrm { z } & 30 & \mathrm { v } , \mathrm { y }\end{array}$ If the company wants the output rate to be equal to demand, what is the desired cycle time (in seconds) ?

Which of the following is not a process commonly considered in making products or delivering services?

"Balance delay" is another name for the percentage of idle time in a product layout.

The goal of line balancing is to assign tasks to workstations in such a way that the workstations have approximately equal time requirements.

As a general rule, continuous processing systems produce products for inventory rather than for customer order.

The type of layout in which workers, materials, and equipment are moved to the product as needed is:

A company needs to locate three departments (X, Y, and Z) in the three areas (I, II, and III) of a new facility. They want to minimize interdepartmental transportation costs, which are expected to be $.50 per load meter moved. An analyst has prepared the following flow and distance matrices: $\begin{array}{l}\text { Distances (meters) } \quad\quad\quad\quad\quad\quad \text { Flows (loads per week }\\\begin{array}{rlll}\text { From/To } & \text { I } & \text { II } & \text { III } \\\hline \text { I } & - & 10 & 20 \\\text { II } & & - & 10 \\\text { III } & & & -\end{array}\quad\quad\begin{array}{rlll}\text { From/To } & \mathrm{X} & \mathrm{Y} & \mathrm{Z} \\\hline \mathrm{X} & - & 0 & 80 \\\mathrm{Y} & 30 & - & 150 \\\mathrm{Z} & 100 & 130 & -\end{array}\end{array}$ What are total weekly costs for an optimum layout?

In cellular manufacturing, machines and equipment are grouped by type (e.g., all grinders are grouped into a cell).

Given the following line balance data: $\begin{array} { l c c } \text { Task } & \text { Predecessor } & \text { Time (seconds) } \\\hline \mathrm { t } & \text { none } & 15 \\\mathrm { u } & \mathrm { t } & 14 \\\mathrm { v } & \mathrm { t } & 7 \\\mathrm { w } & \mathrm { u } & 6 \\\mathrm { x } & \mathrm { v } & 8 \\\mathrm { y } & \mathrm { w } , \mathrm { x } & 10 \\\mathrm { z } & \mathrm { y } & 21\end{array}$ For eight hours of operating time per day and a desired output rate of 960 units per day, what is the minimum number of stations needed to achieve the appropriate cycle time?

Which of the following is not a characteristic of layout decisions in system design?

Product layouts involve high utilization of labor and equipment.

Heuristic rules are used primarily in which of these types of layouts? (I) Product (II) Process (III) Fixed-position

Which of the following process types would be most likely to be used in the maturity phase of a product's life cycle?

The maker of the world-famous Chocolate Chip Cookies needs to design a product layout for a new product, Mint Chocolate Chip. The company plans to use this new production line eight hours a day in order to meet projected demand of 1,440 cases per day. The following table describes the tasks involved in the production of a Mint Chocolate Chip Cookie. $\begin{array} { l l l } \text { Task } & \text { Time } ( \text { secs } ) & \text { Immediate Predecessor } \\\hline \mathrm { u } & 4 & \text { none } \\\mathrm { v } & 14 & \mathrm { u } \\\mathrm { w } & 12 & \mathrm {~V} \\\mathrm { x } & 12 & \mathrm {~V} \\\mathrm { y } & 6 & \mathrm { w } \\\mathrm { z } & 8 & \mathrm { x } , \mathrm { y }\end{array}$ For output to equal projected demand, what is the minimum number of workstations needed?

Avoiding bottlenecks is the primary goal of product design.

QRS Corp. is designing a product layout for a new product. They plan to use this production line 10 hours a day in order to meet forecasted demand of 900 units per day. The following table describes the tasks necessary to produce this product: $\begin{array} { l l l } \text { Task } & \text { Time (secs) } & \text { Immediate Predecessor } \\\hline \text { a } & 34 & \text { none } \\\text { b } & 20 & \text { a } \\\text { c } & 10 & \text { b } \\\text { d } & 16 & \text { b } \\\text { e } & 10 & \text { c } \\\text { f } & 24 & \text { d, e } \\\text { g } & 38 & \text { f }\end{array}$ For output to equal forecasted demand, what is the minimum number of workstations needed?