Operations Management: Processes and Supply Chains (12th Edition) (What's New in Operations Management)
12th Edition
ISBN: 9780134741062
Author: Lee J. Krajewski, Manoj K. Malhotra, Larry P. Ritzman
Publisher: PEARSON
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Question
Chapter 6, Problem 5P
(a)
Summary Introduction
Interpretation:The implied level of safety stock in the organization’s system.
Concept Introduction:A safety stock is an additional amount of stocks maintained by businesses in facing unforeseen events such as stock outs. Such shortfalls in stocks may be related to raw material or even packaging. The unforeseen events that cause stock outs may be in relation to demand or supply. Sufficient levels of safety stocks enable businesses to continue operations without disruptions even at troublesome times.
(b)
Summary Introduction
Interpretation:The anticipated decrease in waiting time provided that one container was removed.
Concept Introduction:Lead time is period of time between one operation and the next within a process. It is often used in operations management with regard to production lines. It is typically the time taken for the material to reach a work station from the previous one. In relation to the given scenario, if one container is being removed, the waiting time calculated previously must be reduced to keep up with previous timings.
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You are asked to analyze the kanban system of LeWin, a French manufacturer of gaming devices. One of the workstations feeding the assembly line produces part M670N. The daily demand for M670N is 1,800 units. The average processing time per unit is 0.003 day. LeWin’s records show that the average container spends 1.05 days waiting at the feederworkstation. The container for M670N can hold 300 units. Twelve containers are authorized for the part. Recall that r is the average processing time per container, not per individual part.a. Find the value of the policy variable, a, that expresses the amount of implied safety stock in this system.b. Use the implied value of a from part (a) to determine the required reduction in waiting time if one container was removed. Assume that all other parameters remain constant.
You are asked to analyze the kanban system of LeWin, a French manufacturer of gaming devices. One of the workstations feeding the assembly line produces part M670N. The daily demand for M670N is 1,775 units. The average processing time per unit is 0.004 day. LeWin's records show that the average container spends 0.900 days waiting at the feeder workstation. The container for M670N can hold 400 units. 15 containers are authorized for the part. Recall that p is the average processing time per container, not per individual part.
Part 2
a. The value of the policy variable α, that expresses the amount of implied safety stock in this system is
__
You are asked to analyze the kanban system of LeWin, a French manufacturer of gaming devices. One of the workstations feeding the assembly line
produces part M670N. The daily demand for M670N is 1,750 units. The average processing time per unit is 0.004 day. LeWin's records show that the
average container spends 1.050 days waiting at the feeder workstation. The container for M670N can hold 375 units. 16 containers are authorized for the
part. Recall that p is the average processing time per container, not per individual part.
a. The value of the policy variable, a, that expresses the amount of implied safety stock in this system is 0.345 . (Enter your response rounded to three
decimal places.)
b. Use the implied value of alpha from part a to determine the required reduction in waiting time if 2 containers were removed. Assume that all other
parameters remain constant.
The new waiting time is
day(s) (enter your response rounded to three decimal places)
Chapter 6 Solutions
Operations Management: Processes and Supply Chains (12th Edition) (What's New in Operations Management)
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