The term knowledge has many varied definitions across the board depending on the context in which the term is being utilized. In terms of the project management arena, the term knowledge refers specifically to the simple knowing of something with a solid basis and considerable amount of familiarity. This awareness can come through previous work or situational experiences, it can be gained through an extensive amount of education that has been geared toward this particular topic, a through track record of careful and consistent observation (although this knowledge, in more of a 2<sup>nd</sup> and variety, is of potentially less consistent use), as well as through any course of independent investigation. Knowledge can also refer to, in a more practical usage, to the utter and total understanding of he particular processes, practices, techniques, and tools that are part of the standard project management processes, as well as the familiarity with how to acquire contact with those who may know the information that is lacking.
This term is defined in the 3rd edition of the PMBOK but not in the 4th.