Delays during material purchase and supply are widespread in most projects around the world. Some of the delay happens at the time of purchasing of material for the project that is the period which is before the start of project as well as during actual execution of project is under way. Project schedules are consistently dynamic and uncertain. Several controllable and uncontrollable factors can adversely affect the project schedule and cause delays. These delays definitely create negative impacts on project performance. Schedule delay in the completion of a Construction projects may be a major difficulty for contractors leading to costly disputes and adverse relationships between project participants. The challenge is to measure the net impact of Supply chain delays accurately.. The method of schedule delay analysis technique should be acceptable to all participants through the project.
Delays in the completion of projects are often unavoidable. The project schedule which is planned at the beginning of the project is prone to being changed for many times and unfortunately causes delays. As a result, schedule delays may be a major problem for contractors as well as the owners, resulting in costly disputes, controversial issues and adverse relationships between all the 3project participants. Therefore, the identification, quantification and analysis of delays become essential. Contractors are prone to see most of the delays in the responsibility of the owner, while owners usually want to put the blame on the contractor or third parties. Consequently, it is necessary to analyze schedule delays and research the most significant causes of delay in projects to avoid or minimize their adverse impacts on the project and project participants.
These delays in purchasing and supply chain management may be due to various factors some of which are internal organizations and some are outside of organization. Internal factors such as delays from other