Geocentric model Geocentric model In astronomy, the geocentric model (also known as geocentrism, or the Ptolemaic system) is a superseded description of the Universe with Earth at the center. Under the geocentric model, the Sun, Moon, stars, and planets all orbited Earth. The geocentric model served as the predominant description of the cosmos in many ancient civilizations, such as those of Aristotle and Ptolemy. Two observations supported the idea that Earth was the center of the Universe. First, from anywhere on Earth, the Sun appears to revolve around Earth once per day. While the Moon and the planets have their own motions,
Procedure (term) Procedure (term) A procedure is a document written to support a "policy directive". A procedure is designed to describe who, what, where, when, and why by means of establishing corporate accountability in support of the implementation of a "policy". The "how" is further documented by each organizational unit in the form of "work instructions" which aims to further support a procedure by providing greater detail. As an example, suppose a manufacturing facility established a policy that all overtime shall be approved. A procedure can be created to establish “Who” can approve overtime (ranks, roles & responsibilities), "What" forms or systems