Journal
DECISION SCIENCES
Volume 34, Issue 3, Pages 443-466Publisher
BLACKWELL PUBLISHING INC
DOI: 10.1111/j.1540-5414.2003.02274.x
Keywords
analytic hierarchy process; Bayesian inference; multicriteria decision making (MCDM); logit modeling; Markov chains; and simulation
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In the analytic hierarchy process (AHP), priorities are derived via a deterministic method, the eigenvalue decomposition. However, judgments may be subject to error. A stochastic characterization of the pairwise comparison judgment task is provided and statistical models are introduced for deriving the underlying priorities. Specifically, a weighted hierarchical multinomial logit model is used to obtain the priorities. Inference is then conducted from the Bayesian viewpoint using Markov chain Monte Carlo methods. The stochastic methods are found to give results that are congruent with those of the eigenvector method in matrices of different sizes and different levels of inconsistency. Moreover, inferential statements can be made about the priorities when the stochastic approach is adopted, and these statements may be of considerable value to a decision maker. The methods described are fully compatible with judgments from the standard version of AHP and can be used to construct a stochastic formulation of it.
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