Cycle-Time Analysis Variability is often considered to be the enemy of efficient and effective management. One approach to managing cycle times to improve delivery dependability is to map out the associated activities in a value-added process using a process flow diagram (see diagram in problem þelow). This allows the manager to identify and measure the specific activities so that the management process can be made more effective. The following problem illustrates the use of cycle time analysis.

Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter12: Queueing Models
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Cycle-Time Analysis
Variability is often considered to be the enemy of efficient and effective management. One
approach to managing cycle times to improve delivery dependability is to map out the associated
activities in a value-added process using a process flow diagram (see diagram in problem þelow). This
allows the manager to identify and measure the specific activities so that the management process can
be made more effective. The following problem illustrates the use of cycle time analysis.
Problem
Company X has recently completed an analysis of its primary value-added process. As part of this
analysis, the major flows have been mapped such that the process has been broken down into 10 major
activities. To better understand the process, the times to complete,each of these activities have been
carefully monitored over the past month. The results of this monitoring follow.
(3:3)
(1:0.4)
(10:6)
(5:2.8)
Activity 4
Standard
Mean Deviation
Activity 5
Activity 6
Activity 7
Activity
8
2.4
1.2
4
Activity 3 (15:2.1)
Activity 8
(3:3)
15
2.1
4
3
3.0
1
0.4
Activity 2 (4:1.2)
Activity 9 (20:4.5)
6
10
6.0
7
2.8
8
3
3
Activity 1
(8:2.4)
Activity 10 (4:0.3)
9
20
4.5
0.3
10
4
(Mean: Standard Deviation)
DFC
立
Transcribed Image Text:Cycle-Time Analysis Variability is often considered to be the enemy of efficient and effective management. One approach to managing cycle times to improve delivery dependability is to map out the associated activities in a value-added process using a process flow diagram (see diagram in problem þelow). This allows the manager to identify and measure the specific activities so that the management process can be made more effective. The following problem illustrates the use of cycle time analysis. Problem Company X has recently completed an analysis of its primary value-added process. As part of this analysis, the major flows have been mapped such that the process has been broken down into 10 major activities. To better understand the process, the times to complete,each of these activities have been carefully monitored over the past month. The results of this monitoring follow. (3:3) (1:0.4) (10:6) (5:2.8) Activity 4 Standard Mean Deviation Activity 5 Activity 6 Activity 7 Activity 8 2.4 1.2 4 Activity 3 (15:2.1) Activity 8 (3:3) 15 2.1 4 3 3.0 1 0.4 Activity 2 (4:1.2) Activity 9 (20:4.5) 6 10 6.0 7 2.8 8 3 3 Activity 1 (8:2.4) Activity 10 (4:0.3) 9 20 4.5 0.3 10 4 (Mean: Standard Deviation) DFC 立
(Mean: Standard Deviation)
Your Answers
What is the average completion time for this value-added process?
What is the standard deviation for the entire process?
What is the probability that process will be completed in 75 hours?
in 80 hours?
in 70 hours?
Develop a 95 percent confidence interval for the process.
If you aren't confident in your ability to make delivery promises, where
should you target your improvement efforts? How would you proceed?
DFom
立
Transcribed Image Text:(Mean: Standard Deviation) Your Answers What is the average completion time for this value-added process? What is the standard deviation for the entire process? What is the probability that process will be completed in 75 hours? in 80 hours? in 70 hours? Develop a 95 percent confidence interval for the process. If you aren't confident in your ability to make delivery promises, where should you target your improvement efforts? How would you proceed? DFom 立
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ISBN:
9781337406659
Author:
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Publisher:
Cengage,