ahp - 1 dr. chen - dss analytical hierarchy process (ahp): a multi-objective decision making...
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AHP - 1Dr. Chen - DSS
Analytical Hierarchy Process (AHP): A Multi-Objective
Decision Making Technique
Jason Chen, Ph.D.Professor of MIS
School of BusinessGonzaga UniversitySpokane, WA [email protected]
http://www.cs.adfa.oz.au/teaching/studinfo/da2/lectures/L14html/sld001.htm
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Analytical Hierarchy Process
• In many situations one may not be able to assign weights to the different decision factors. Therefore one must rely on a technique that will allow the estimation of the weights.
• What is a solution?
• One such process, The Analytical Hierarchy Process (AHP), involves pairwise comparisons between the various factors.
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Analytical Hierarchy Process (cont.)
• The process is started by the decision maker creating the value tree associated with the problem.
• The proceed by carrying out pairwise comparisons, both between– Alternatives on each factor, and– Factors at a given node.
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Application Case of AHP
• Jane is about to graduate from college and is trying to determine which job offer to accept. She plans to choose between three offers by determining how well each offer meets the following criteria (objectives):
– High starting salary– Quality of life in city where job is located– Interest of work– Nearness of job to family
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Assumptions
• Jane has hard time in prioritizing those criteria. In other words, she needs to find one way to decide the weights for those criteria. AHP provides such a function.
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Determine the problem
• What job offer will give Jane possibly highest satisfaction?
• Structure the hierarchy by putting the top objective (satisfaction with job), criteria, and alternatives as follows.
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Satisfaction with a Job
Starting Salary Life Quality InterestNearness to
Family
Job A Job B Job C
Structure of the Problem
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Satisfaction with a Job
Starting Salary Life Quality InterestNearness to
Family
Job A Job B Job C
Structure of the Problem
Web site:http://www.hipre.hut.fi/
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The Principle of the AHP …
• The principle of the AHP relies on the pairwise comparison. This comparison is carried out using a scale from 1 to 9 as follows:– 1 Equally preferred– 2 Equally to Moderately preferred– 3 Moderately preferred– 4 Moderately to Strongly preferred– 5 Strongly preferred– 6 Strongly to Very Strongly preferred– 7 Very Strongly preferred– 8 Very to Extremely Strongly preferred– 9 Extremely preferred
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A pairwise comparison matrix for the criteria level
12/124/1
2122/1
2/12/115/1
4251
Nearness
Interest
Quality
Salary
NearnessInterestQualitySalarySatisfaction with a Job
Web site:http://www.hipre.hut.fi/
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12/14/1
212/1
4211
CJob
BJob
AJob
CJobBJobAJobSALARY
A
Using the same steps of 3 and 4 to determine the score of each alternative on each criterion. Take the first criterion Salary as an example. One pairwise matrix is constructed as follows:
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click
double click
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Result from double clicking “salary”
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Result from double clicking “life quality”
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Result from double clicking “interest”
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Result from double clicking “nearness to family”
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click
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click
Result from “Analysis of Composite Priorities … “
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Result from “Analysis of Composite Priorities … “ – with Values
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Result as Text
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Your Turn -- Try It!
Http://www.hipre.hut.fi
File name: mbus633.jmd (BiEMBA.jmd)
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Double click
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Edit the element’s Name
Select this
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Left click
Steps of creating “Links”
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Right click
Complete the remaining links
Steps of creating “Links” (cont.)
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Steps of creating “Links” (cont.)
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Steps of assigning weights to different decision factors
• Goal level (satisfaction with job)
• Criteria level (salary, life quality, interest, and nearness to family)
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Double left click
Steps of assigning weights to different decision factors
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Steps of assigning weights to different decision factors (cont.)
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Steps of assigning weights to different decision factors (cont.)
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Steps of assigning weights to different decision factors (cont.)
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Steps of assigning weights to different decision factors (cont.)
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Steps of assigning weights to different decision factors (cont.)
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Steps of assigning weights to different decision factors (cont.)
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Steps of assigning weights to different decision factors (cont.)
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Double left click
Steps of assigning weights to different decision factors (cont.)
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Steps of assigning weights to different decision factors (cont.)
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Steps of assigning weights to different decision factors (cont.)
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Perform Analysis
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Perform Analysis (cont.)
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Perform Analysis (cont.)
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Perform Analysis (cont.)
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Save your work
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Have a fun!
Http://www.hipre.hut.fi
File name: mbus633.jmd (BiEMBA.jmd)