An Assumption is the action of taking that is accepted as true or certain without question or proof. A Project Assumption is any event and circumstance that is expected to occur during the project execution, and needed to control and manage by a creation and fulfillment of the Project Assumptions List including a responsible person per each assumption item, and the Project Risk Management. (Refer to the Risk Assumption)
Reference Definition by PMI: Assumptions are “factors that, for planning purposes, are considered to be true, real, or certain without proof or demonstration”. Since an assumption is treated as an absolute, this could mean that the only characteristic to consider is its potential impact. However the “absence of demonstration or proof” means that validity rests on many factors, including the certainty of the statement. The initial defining element is “for planning purposes,” which implies that if assumptions are not made, planning cannot proceed and that invalid assumptions lead to invalid plans.
Related Definitions in the Project: The Project Management; Risk Management; Project Controls
