The construction industry calls for a unique type of project management, as many projects require large amounts of materials, physical tools and labor, and involve numerous and diverse stakeholders. Also, construction projects often affector are affected bythe environment. Due to these and other characteristics specific to construction projects, the Project Management Institute (PMI) has produced the Construction Extension. The book aims to improve the efficiency and effectiveness of construction project management. Like other extensions, the book is meant to be a companion to the PMBOK Guide, rather than a stand-alone document.