Changes in construction projects are very common and likely to occur from different sources, by various
causes, at any stage of a project, and may have considerable negative impacts on items such as costs and
schedule delays. A critical change may cause consecutive delays in project schedule, re-estimation of work
statement, and extra demands of equipment, materials, labor, and overtime. Changes, if not resolved through a
formalized change management process, can become the major source of contract disputes, which is a severe
risk contributing to project failure.