Project Management tools and techniques are simply the process of coordinating the contractor’s resources to achieve the Employer genuine results. Each project has it is own level of project management tailored to the project unique case. In Project initiation stage, various inputs drive the main project key assumptions relevant to Project Scope, Duration, Cost and Stakeholders. Those same Assumptions could impose a reason for the contractor not to meet project completion date and to be tilted as causes of delay or Delay Events. Some might understand that since the topic is Time Extension Claim, so we focus on project timeline, this could be true! However, we will expand to “Project Programme of Work (Baseline)” where assigned resources, cost, quantities, and sequence of work will drive Project Progress. This will illustrate why the contractor need to secure agreed Baseline. Regardless the debate whither or whither not the Baseline is a contractual document, require approval or not. In Fact, we will just in this paper assume that; the contractor has signed contract, approved programme, and the contractor managed to comply with all contract clauses to submit a proper extension of time claim. Hence, in this Paper we will tickle the Contract Administrator action upon receiving this claim, methods of delay analysis, and determination report contents.