Measuring the impact of critical success factors of a project on the success of a project in telecommunications companiesIntroduction: The success of a project is one of the ambiguous concepts of project management. As each person or group of people involved in a project has different needs and expectations from the same project, it is very common for them to view the success of the project in their own way, according to their own understanding (Cleland and Ireland, 2004 ). Research on project measurement deliverables and emphasis on key project management practices (time, cost and quality) shows that it is not possible to have one ubiquitous, one-size-fits-all success criterion. the projects. The focus of project management activities differs from project to project based on a number of attributes such as project uniqueness, activity, volume, complexity, project preferences, customers and the interest of stakeholders. It is therefore not enough to assume that time, cost and quality are the only factors for the success of a project, but they must be explored and quantified with the overall establishment of a number of evaluation criteria of multifaceted and unified project (Ojiako et al., 2008). .The difference between criteria and factors is not clear to many people. The Cambridge Advanced Learner's Dictionary describes a criterion as "a standard by which you judge, decide, or treat something" while a factor is explained as "a fact or situation that influences the outcome of something." In this study, I tried to establish a relationship between project success factors and actual project success variables through literature and empirical analysis from the research of Andersen et al (2006). The focus would be on the telecom sector of Pakistan. Indeed, middle of paper ......nts, 24 percent worked as project managers, 62 percent as project team members, 14 percent as end users; 84 percent men, 16 percent women; 73 percent of projects were oriented toward production or construction, 12 percent toward research and development, 15 percent toward decision support; 32 percent work on large projects, 58 percent medium-sized, 10 percent small. Analysis and results Data are analyzed via SPSS version 16. As all questionnaires were self-administered, it was established before launching the questionnaire that all respondents had to be involved. activities related to project management and must be aware of the concept of project success. The validity of the questionnaire was checked using the Cronbach alpha test (the results are reported in Table I). Appendix A shows the full list of questions asked.