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Exam 9: Layout Strategies

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Question 1

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An assembly line consists of 21 tasks grouped into 5 workstations.The sum of the 21 task times is 85 minutes.The largest assigned cycle time is 20 minutes.What is the efficiency of this line?

A) 4.2 percent
B) 17 percent
C) 85 percent
D) 100 percent
E) 21 percent

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

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C

Question 2

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The techniques for addressing the fixed-position layout are complicated by what three factors? What is an alternative strategy to address these?

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(1)There is limited space at virtually a...

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Question 3

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Identify McDonald's seven major innovations.

A company is trying to balance production between 3 workstations on an assembly line.Currently there are 5 tasks that need to be performed.These tasks,ABCDE,have required times of 2 minutes,4 minutes,1 minutes,3 minutes,and 10 minutes,respectively.The assembly line needs to produce 40 units per day to meet demand and can work for up to 8 hours each day. (a)What is the required cycle time? (b)What is the theoretical minimum # of workstations? (c)Assign the tasks according to the shortest task time heuristic.

A production line is to be designed for a product whose completion requires 21 minutes of work.The factory works 400 minutes per day.Can an assembly line with five workstations make 100 units per day?

Balancing a work cell is done:

A focused work center is well suited to the production of a large family of products requiring similar processing,even if their demands are not very stable.

The objective of layout strategy is to develop an effective and efficient layout that will meet the firm's competitive requirements.

A work cell is scheduled to build 120 digital light processor (DLP)assemblies each week.These assemblies are later installed into home theater projection systems.The work cell has 7.5 hours of productive work each day,six days per week.What is takt time for this cell?

A facility is trying to set up an assembly line,and has identified the various tasks,and their relationship to each other,as shown in the following table.Managers wish to produce 600 units per day,working two 8-hour shifts. (a)Draw a network diagram of precedence relationships. (b)Compute the required cycle time per unit in seconds. (c)Compute the minimum number of workstations required to produce 600 units per day. (d)Balance this line using the longest processing time heuristic. (e)What is the efficiency of the line obtained in part (d)?

The disadvantages of process-oriented layout come from:

Which of the following is NOT one of the requirements of cellular production?

The main issue in designing process-oriented layouts concerns the relative positioning of:

A product requires 24 separate tasks,and the sum of those task times is 14 minutes.If the cycle time is 2 minutes,then at least 12 workstations will be needed.

What are the advantages of focused factories?

An assembly line with 11 tasks is to be balanced.The longest task is 2.4 minutes,the shortest task is 0.4 minutes,and the sum of the task times is 18 minutes.The line will operate for 600 minutes per day. (a)Determine the minimum and maximum cycle times. (b)What range of output is theoretically possible for the line? (c)What is the minimum number of stations needed if the maximum output rate is to be sought? (d)What cycle time will provide an output rate of 200 units per day?

A process-oriented layout is the traditional way to support a product differentiation strategy.

An assembly line is assigned as follows.Station 1- task A,B,and C.Station 2- task D.Station 3- task E and F.The task times are 7,3,2,9,4,and 5 minutes respective to A,B,C,D,E,and F.(Assume that there is no precedence relationships between the tasks,i.e.they can be performed in any order) (a)Calculate the efficiency. (b)What would the assignment of tasks to stations be using the shortest processing time heuristic (assuming the current maximum station time remains the cycle time)?

Which of the following is a disadvantage of product-oriented layout?

A work cell is required to make 140 computerized diagnostic assemblies (for installation into hybrid automobiles)each day.The cell currently works an eight hour shift,of which seven hours is available for productive work.These assemblies require five operations.Standard times for these operations are: Operation A,3.0 minutes,B,1.8 minutes,C,2.4 minutes,D,2.5 minutes,and E,1.4 minutes. (a)What is takt time for this cell? (b)How many workers will be needed to achieve this schedule?