Abstract
Quality of the construction project indeed represents the success of the project. A significant amount of budget is spent towards the infrastructure development of our country. When the quality of the project is not according to standards, faulty construction takes place, where huge amount is being spend to rectify the defects. Inthis project the factors which affect the construction is studied and the critical factor is found. This includes of personal interviews in various construction companies and conducting questionnaire survey and analysis of the obtained data. Preliminary survey has been carried out and the major factors are found to be Design, Material, Equipment,Sub Contractor, Financial Issues and Owner. The data are analysed using SPS SSoftware. The Relative Importance Index (RII) for various factors are found from which the most critical factor has been identified. The suggestions are given as a proactive measure to improvement of the quality of construction by visiting various construction sites. The quality control and quality assurance measures for the critical factor are to be suggested.