PMP Mark Mullaly & Janice Thomas 
Researching the Value of Project Management [PDF ebook] 

Consulting and practitioner literature often discusses and proclaims project management value; however the actual value resulting from investments in project management has been hard to define, let alone measure. In the past, few rigorous studies have been conducted to seek out the measurable value of project management. The Project Management Institute requested proposals in 2004 for research designed to quantify the value of project management. This monograph, Researching the Value of Project Management Research, documents the three years of fieldwork and cross-disciplinary analysis conducted between May 2005 and June 2008 by the research team that won the proposal.