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Journal of Intelligent Manufacturing

, Volume 30, Issue 8, pp 2945–2964 | Cite as

A multi-stage satisfaction index estimation model integrating structural equation modeling and mathematical programming

  • Adnan AktepeEmail author
  • Süleyman Ersöz
  • Bilal Toklu
Article

Abstract

In this study, a satisfaction index estimation model is proposed integrating structural equation modeling and mathematical programming methods with fuzzy customer data. Firstly, a deep literature survey is conducted in this field of study. Then, a new model is proposed by taking into consideration gaps in the literature. The estimation model is composed of five stages and first stage is building conceptual model in which measurement and latent variables are introduced. At the second stage, a fuzzy evaluation method is developed for decreasing subjectivity in customer data. At the third stage, for measurement variables that are directly observed, a measurement model is developed with Linear Structural Relations. In the solution of the measurement model maximum likelihood algorithm is used. In the solution of structural model that is composed of latent variables that are not directly observed, a mathematical estimation model is developed in this study at the fourth stage. Mathematical model is coded in ILOG Cplex Optimization Studio. In the mathematical model that minimizes estimation errors, structural relations and measurement variable weights (precedence coefficients) are defined as constraints. At the fifth and last stage, index scores are calculated with mathematical model outputs. Application of the model is carried out in public sector at a local government service point. In the application model, service quality, innovation, communication, satisfaction and cost perception dimensions are used. Application results are discussed for both measurement and latent variables in detail. The results of model we developed are also compared with an alternative model outcomes and we show that we achieve optimum estimation capability with minimum estimation errors.

Keywords

Customer satisfaction index Citizen satisfaction index Fuzzy pessimistic–optimistic approach LISREL ILOG Cplex Optimization Estimation methods 

Notes

Acknowledgments

This study was partially supported by 1001 scienctific project programme of The Scientific and Technological Research Council of Turkey-TUBITAK. Our special thanks go to TUBITAK 1001 and 2211 programs for financial support, to expert team for their scientific efforts, to the students of Kirikkale University Industrial Engineering Department for their support in data collection and finally to anonymous reviewers for their constructive comments.

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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.Department of Industrial Engineering, Faculty of EngineeringKirikkale UniversityKirikkaleTurkey
  2. 2.Department of Industrial Engineering, Faculty of EngineeringGazi UniversityAnkaraTurkey

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