International Journal of Electrical and Computer Engineering (IJECE) Vol. 13, No. 1, February 2023, pp. 948~956 ISSN: 2088-8708, DOI: 10.11591/ijece.v13i1.pp948-956  948 Journal homepage: http://ijece.iaescore.com Implementation of a decision support process for evaluating the correlation between IT investment and of information systems success Ansar Daghouri 1,2 , Khalifa Mansouri 2 1 Interdisciplinary Research Laboratory in Sciences, Education and Training Higher Education and Training School, Hassan 1 st University, Settat, Morocco 2 Laboratory: Modeling and Simulation of Intelligent Industrial Systems, ENSET of Mohammedia, Hassan II University, Casablanca, Morocco Article Info ABSTRACT Article history: Received Nov 29, 2021 Revised Aug 8, 2022 Accepted Sep 3, 2022 The main objective of this paper is to study the correlation between investment in information technologies and especially information systems and information system success based on data collection and a multi-criteria decision-making approach using technique for order preference by similarity to ideal solution (TOPSIS) and analytical hierarchy process (AHP) methods. The criteria of the hierarchical model for evaluating the information system success are chosen from Delone and McLean information systems (IS) success model. The proposed approach has been implemented in 3 sectors recognized by their variation in the use of information systems: the financial sector, the service companies sector, and the construction industry sector. Therefore, the results of this implementation show that massive investment in information systems does not always guarantee good information system success, and information system success is not always the result of massive investment in the information system. Keywords: Criteria Evaluation Information system Investment Technique for order preference by similarity to ideal solution This is an open access article under the CC BY-SA license. Corresponding Author: Ansar Daghouri Interdisciplinary Research Laboratory in Sciences, Education and Training Higher Education and Training School, Hassan 1 st University Settat, Morocco Email: dagh.ansar@gmail.com 1. INTRODUCTION Business leaders are constantly seeking to create value through the implementation of information systems (IS) that bring tangible and intangible gains [1]. This is why they invest heavily in IS for improving the success of their IS [2]. In recent years, the investment value has become exponential due to competitive intelligence and the enormous evolution of technology, which has changed the basic structure of the company as well as its modes of production, management, and marketing [3]. This extra investment pushes managers as well as researchers in the field to question the effectiveness and relevance of these investments concerning the success of their IS. Thus, the main problem consists in answering the following question: if I invest massively in IS, do I have an efficient IS and if I have an efficient IS, have I necessarily invested massively in my IS? Returning to the literature, we observe that the majority of studies [4]–[7] that have dealt with this issue have focused on collecting data and analyzing the results obtained without proposing a structured approach or a general hierarchical evaluation model that can be adopted regardless of the field of study [8]. The main purpose of this paper is to develop a multi-criteria decision support approach [9] based on data collection and multiple-criteria decision-making (MCDM) methods to study the correlation between IS investment and IS