Distinct stages of a development project or of a version within a project; the high-level divisions of a project. The recommended project phases for a system development project are: Conceive, Plan, Design, Develop, Test, Train, Implement and Close-Out.
Drugs pass through three phases of testing. During Phase I, drugs are tested, usually in healthy subjects, to determine safety, and how the drug acts in the body. During Phase II, a limited number of people with the disease targeted by the drug are studied to evaluate the drug's safety, effectiveness, and dosage in treating the disease. In Phase III, testing is expanded to further verify safety and effectiveness in the target population.