Simple or complex, large or small, projects fail due to multiple influencing factors and the reasons can be numerous. Since each project is distinctive, has defined start and end dates, a limited budget and involves multiple stakeholders, it is difficult to avoid failure unless the appropriate resources, methodologies and processes are in place. place. The main factors that could lead to project failure are unachievable requirements, unrealistic deadlines, unqualified resources, poor communication, unreliable estimates, poor quality, poor governance and inadequate risk management . To avoid project failure, it is very important that these influencing factors are managed appropriately through constructive planning and monitoring. Project managers have a significant responsibility in the failure or success of a project, as they are the ones who direct, plan, and monitor the progress of the engagement. There are a number of factors that explain the project's failure. Lack of governance, inadequate level of oversight and lack of operational competence are the reasons for project failure. Bad requirements that cause a lack of purpose are the cause of project failure. Ambiguous, unclear, contradictory and untestable requirements lead to project failure. Unreliable, overly tight, overly optimistic and unrealistic estimates and deadlines are another important reason that leads to project failure. Project stakeholders often try to estimate/calculate task duration, costs, and resources for a project based on their experience or previous projects instead of using appropriate estimation techniques tailored to the project. The result leads to an erroneous schedule, increased risks and, in turn, project failure. Bad, ineffective... middle of paper ... and poor project management practices. Furthermore, according to the article “The Role of the Project Manager in Improving Project Performance” by Abu Hassan Abu Bakar on November 6, 2011, project managers with effective project management techniques will ensure the overall success of the project. the completion of the project within the limits of costs and schedule. , quality in meeting customer requirements. The source of project failures involves multiple stakeholders, inefficient processes and ultimately having the right people in the right places with effective and realistic governance would lead the project outcome to success. And a skilled project manager with effective project management gives a plan for the project results. Once the project is defined and agreed, the project manager focuses on managing the project delivery through effective methodologies to drive the outcome towards success..