Practical Operations Management
2nd Edition
ISBN: 9781939297136
Author: Simpson
Publisher: HERCHER PUBLISHING,INCORPORATED
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Chapter 6, Problem 19P
Summary Introduction
Interpretation: Efficiency of assembly line is to be calculated.
Concept Introduction: An assembly line is a sequence of work in which an output is produced by adding inputs to semi-finished goods which moves from work station to another work station.
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An assembly line is to be designed to operate 13 hours per day and supply a steady demand of 325 units per day. Here are the tasks and their performance times:
TASK
PRECEDINGTASKS
PERFORMANCE TIME (SECONDS)
TASK
PRECEDINGTASKS
PERFORMANCETIME (SECONDS)
a
—
48
g
d
43
b
—
58
h
e
38
c
—
73
i
f
23
d
a
63
j
g
33
e
b
88
k
h, i
53
f
c
23
l
j, k
67
A) What is the efficiency of your line balance?
B) Suppose demand increases by 10 percent. How would you react to this? Assume that you can operate only 13 hours per day in regular time. (Round your answers to the nearest whole number.)
The process design team at a manufacturer has broken an assembly process into eight basic steps, each with a required time and predecessor as shown in the table. They work an 8-hour day and want to produce at a rate of 360 units per day. What should their takt time be?
An assembly line with 20 activities is to be balanced. The total amount of time to complete all 20 activities is 50 minutes. The longest activity takes 2.4 minutes and the shortest takes 0.9 minute. The line will operate for 300 minutes per day.
What are the maximum and minimum cycle times? Round your answers to one decimal place.
Maximum cycle time: minutes
Minimum cycle time: minutes
How much daily output will be achieved by each of those cycle times? Round your answers to the nearest whole number.
Daily output achieved by maximum cycle time: units/day
Daily output achieved by minimum cycle time: units/day
Chapter 6 Solutions
Practical Operations Management
Ch. 6 - Prob. 1DQCh. 6 - Prob. 2DQCh. 6 - Prob. 3DQCh. 6 - Prob. 4DQCh. 6 - Prob. 5DQCh. 6 - Prob. 1PCh. 6 - Prob. 2PCh. 6 - Prob. 3PCh. 6 - Prob. 4PCh. 6 - Prob. 5P
Ch. 6 - Prob. 6PCh. 6 - Prob. 7PCh. 6 - Prob. 8PCh. 6 - Prob. 9PCh. 6 - Prob. 10PCh. 6 - Prob. 11PCh. 6 - Prob. 12PCh. 6 - Prob. 13PCh. 6 - Prob. 14PCh. 6 - Prob. 15PCh. 6 - Prob. 16PCh. 6 - Prob. 17PCh. 6 - Prob. 18PCh. 6 - Prob. 19PCh. 6 - Prob. 20PCh. 6 - Prob. 21PCh. 6 - Prob. 22PCh. 6 - Prob. 23PCh. 6 - Prob. 24PCh. 6 - Prob. 25PCh. 6 - Prob. 26PCh. 6 - Prob. 27PCh. 6 - Prob. 28PCh. 6 - Prob. 29PCh. 6 - Prob. 30PCh. 6 - Prob. 31PCh. 6 - Prob. 32PCh. 6 - Prob. 1.1QCh. 6 - Prob. 1.2QCh. 6 - Prob. 1.3QCh. 6 - Prob. 1.4QCh. 6 - Prob. 2.1QCh. 6 - Prob. 2.2QCh. 6 - Prob. 2.3QCh. 6 - Prob. 3.1QCh. 6 - Prob. 3.2QCh. 6 - Prob. 3.3Q
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, operations-management and related others by exploring similar questions and additional content below.Similar questions
- Mr. Aris Benn manages an assembly line that produces a piece of equipment that is used to clean floors. The process to produce this piece of equipment consists of 10 steps. Determine what other information is needed in order to balance this assembly line. Also, set up a numerical example of the line balancing problem at hand. Using this example, demonstrate how to balance the line and how to calculate its efficiency.arrow_forwardThe 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 case of Mint Chocolate Chip Cookies. 27 seconds 0.3333 seconds 18 seconds 14 seconds 56 seconds 20 secondsarrow_forwardA paced assembly line has been devised to manufacture calculators, as the following data show: Station Work ElementAssigned Work ElementTime (min) S1 S2 S3 S4 S5 S6 A D,E C B,F,G H,I,J K 2.7 0.6, 0.9 3.0 0.7, 0.7, 0.9 0.7, 0.3, 1.2 2.4 a. What is the maximum hourly output rate from this line? (Hint: The line can go only as fast as its slowest workstation.)b. What cycle time corresponds to this maximum output rate?c. If a worker is at each station and the line operates at this maximum output rate, how much idle time is lost during each 10-hour shift?d. What is the line’s efficiency?arrow_forward
- Dr. Lori Baker, operations manager at Nesa Electronics, prides herself on excellent assembly line balancing. She has been told that the firm needs to complete 96 instruments per 24-hour day. The assembly-line tasks for the production of the instrument are: Task Time (minutes) Predecessors A 3 ---- B 6 ---- C 7 A D 5 A, B E 2 B F 4 C G 5 F H 7 D, E I 1 H J 6 E K 4 G, I, J Draw the precedence diagram If the daily production (24-hour) production rate is 96 units, what is the highest allowable cycle time? If the cycle time after allowances is given as 12 minutes, what is the daily (24-hour) production rate? With a 12-minute cycle time, what is the theoretical minimum number of stations with which the line can be balanced? Assign task to workstations. Use the following decision rules (heuristics): longest task first, break ties by assigning the task with the most followers. What are the efficiency and the balance delay of the assembly line? Show detil of…arrow_forwardA company is preparing a bid on a government contract for 40 units of a certain product. The operations manager estimates the assembly time required for the first two units to be 10.4 hours and 8.8 hours, respectively. Approximately how long will it take to produce the last ten units?arrow_forwardYou have just determined the actual number of workstations that will be used on an assembly line to be 6 using the assembly line balancing procedure. The cycle time is 5 minutes, and the sum of all the tasks required ok the line is 25 minutes. What is the value of the resulting line’s efficiency?arrow_forward
- Your process-oriented production layout manufactures a blade, critical part of your M601 engine, in a batch size of 5 pieces. There are four steps in the production process, each taking 2 minutes per piece. To lower the cycle time, you consider building a work-cell that would operate on a single-piece-flow principle. Technological process would not change.A) What would be a reduction in the cycle time (producing the first 5 units)?B) What would be a reduction in your Work-In-Progress inventory?arrow_forwardA paced assembly line has been devised to manufacture calculators, as the following data show: LOADING... Station Work Element Assigned Work Element Time (min) S1 A 4.0 S2 D, E 0.9, 1.5 S3 C 5.0 S4 B, F, G 1.1, 1.0, 1.3 S5 H, I, J 1.1, 0.5, 1.8 S6 K 4.0 a. What is the maximum hourly output rate from this line? (Hint: The line can only go as fast as its slowest workstation.) The maximum hourly output rate is nothing calculators per hour. (Enter your response as an integer.) B. What cycle time corresponds to this maximum output rate? C. If a worker is at each station and the line operates at this maximum output rate, how much idle time is lost during each? 10-hour shift? D. What is the line's efficiency?arrow_forwardSITUATION: A company is about to begin production of a new product. The manager of the department that will produce one of the components for the product wants to know how often the machine used to produce the item will be available for other work. The machine will produce the item at a rate of 200 units a day. Eighty units will be used daily in assembling the final product. Assembly will take place five days a week, 50 weeks a year. The manager estimates that it will take almost a full day to get the machine ready for a production run, at the cost of $300. Inventory holding costs will be $10 a year. QUESTION: Suppose the manager decides to increase the run size of the new product. How many additional units would be needed just to accommodate the other job? How much will that increase the total annual cost?arrow_forward
- Suppose that a firm is considering moving from a batch process to an assembly-line process to better meet evolving market needs. What concerns might the following functions have about this proposed process change: marketing, finance, human resources, accounting, and information systems?arrow_forwardAn assembly line with 17 tasks is to be balanced. The longest task is 2.2 minutes and the total time for all tasks is 19 minutes. The line will operate for 460 minutes per day. A) What is the minimum number of workstations needed if the output rate is to be 186 units per day? B)- What cycle time will provide an output rate of 142 units per day? C) What output will result if the cycle time is (I) 9 minutes and (II) 14 minutes?arrow_forwardAn assembly line with 17 tasks is to be balanced. The longest task is 2.4 minutes, and the totaltime for all tasks is 18 minutes. The line will operate for 450 minutes per day.a. What are the minimum and maximum cycle times?arrow_forward
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