It has been found that poor scope definition is one of the principal causes of project failure in the construction industry. But the owner and contractor companies however share the delusion that it is not economically viable to spend the time or money, required to sufficiently define the scope of work early in a project's life cycle. Sometimes, project participants are unaware about the necessities of a sufficiently defined scope of work. A tool called Project Definition Rating Index (PDRI) was created to address these problems. The PDRI is an easy-to-use, checklist of 68 scope definition elements, letting the users to measure and manage the level of scope definition as project planning progresses