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Chapter 2: Question 8-5DQ (page 189)

Why might it be difficult to develop a manufacturing cell?

Short Answer

Expert verified

Manufacturing cells are utilized to reduce item movement and the mobility of supplies, machinery, as well as workers during the production process.

Step by step solution

01

Manufacturing cells

Manufacturing cells can result in a more productive flow of material, improved interaction, as well as less inventory. They can remove overproduction wastage, excessive stocks, as well as difficulties in over-processing.

02

It might be difficult to develop a manufacturing cell

It might be difficult to develop a manufacturing cell are given below:

  1. The development of manufacturing cells is a vital stage in the implementation of a cellular production line. It can be difficult because similar equipment is needed in other cells, the financial needs may increase.
  2. There must be distinct component families. This necessitates the creation as well as upkeep of a computerized components categorization as well as a coding system. This can be a significant expenditure of funds.
  3. There should be many of each kind of equipment accessible. Considering the expense of procuring as well as keeping a duplicate set of equipment, this may be a costly prospect.
  4. Taking a computer out of clusters must not reduce the cluster's capability completely.
  5. There may be components that cannot be connected with the household as well as specialized equipment that, due to its wide usage, cannot be installed in a cell.
  6. It may beproblematicat first to train individuals to do a variety of activities.
  7. Before a cell can be established, union laws, as well as individual conflicts within the group, should be handled.
  8. The establishment of a cell production system involves industrial restructuring.

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Most popular questions from this chapter

An engineering firm retains a technical specialist to assist four design engineers working on a project. The help that the specialist gives engineers ranges widely in time consumption. The specialist has some answers available in memory, others require computation, and still, others require significant search time. On average, each request for assistance takes the specialist one hour. The engineers require help from the specialist on average of once each day. Because each assistance takes about an hour, each engineer can work for seven hours, on average, without assistance. One further point: Engineers needing help do not interrupt if the specialist is already involved with another problem. Treat this as the finite queuing problem and answer the following questions:

a. How many engineers, on average, are waiting for the technical specialist for help?

b. What is the average time that an engineer has to wait for the specialist?

c. What is the probability that an engineer will have to wait in line for the specialist?

Question: The following represents a process used to assemble a chair with an upholstered seat. Stations A, B, and C make the seat; stations J, K, and L assemble the chair frame; station X is where the two subassemblies are brought together; and some final tasks are completed in stations Y and Z. One worker is assigned to each of the stations. The line is paced using a countdown clock to synchronize production at each station.

Generally there is no inventory kept anywhere in the system, although there is

room for one unit between each of the stations that might be used for a brief amount of time.

Given the following amount of work in seconds required at each station:

a

38

j

32

x

22

b

34

k

30

y

18

c

35

l

34

z

20

a. What is the possible daily output of this 鈥減rocess鈥 if 8 hours of processing time is available each day?

b. Given your output rate in part (a), what is the efficiency of the process?

c. What is the flow time of the process?

What are the Three Ts relevant to poka-yokes in service systems?

You are the newly appointed assistant administrator at a local hospital, and your first project is to investigate the quality of the patient meals put out by the food-service department. You conducted a 10-day survey by submitting a simple questionnaire to the 400 patients with each meal, asking that they simply check off that the meal was either satisfactory or unsatisfactory. For simplicity in this problem, assume that the response was 1,000 returned questionnaires from the 1,200 meals each day. The results are as follows:

Number Of

Unsatisfactory Meals

Sample Size

December 1

74

1,000

December 2

42

1,000

December 3

64

1,000

December 4

80

1,000

December 5

40

1,000

December 6

50

1,000

December 7

65

1,000

December 8

70

1,000

December 9

40

1,000

December 10

75

1,000

600

10,000

a. Construct a p-chart based on the questionnaire results, using a confidence interval of 95.5 percent, which is two standard deviations.

b. What comments can you make about the results of the survey?

Question: Francis Johnson鈥檚 plant needs to design an efficient assembly line to make a new product. The assembly line needs to produce 15 units per hour, and there is room for only four workstations. The tasks and the order in which they must be performed are shown in the following table. Tasks cannot be split, and it would be too expensive to duplicate any task.

Task

Task Time

(Minutes)

Immediate

Predecessor

A

1

-

B

2

-

C

3

-

D

1

A,B,C

E

3

C

F

2

E

G

3

E

a. Draw the precedence diagram.

b. What is the workstation cycle time required to produce 15 units per hour?

c. Balance the line so that only four workstations are required. Use whatever method you feel is appropriate.

d. What is the efficiency of your line balance, assuming the cycle time from part (b)?

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