This recommended practice presents a data model that standardizes categories of generating plant data and data relationships. It provides guidelines for using this data model to integrate computer-aided engineering (CAE) applications across the spectrum of plant work activities during the complete life cycle of the plant from site selection through decommissioning. It contains a description of the plant data model and instructions for the engineering, construction, and operating groups of the utility for specifying integrated CAE applications. The purpose of this recommended practice is To introduce the information engineering concepts that are the basis for integrated CAE developmentTo present a data model that represents the data and data relationships supporting the plant work activities; this model is known as the Plant Information Network (PIN)To define guidelines for applying CAE system technology to the generating-plant life cycle, based on the PINTo describe methods for developing functional specifications for CAE applications based on this model The goal of this recommended practice is to show how to use the PIN as a reference when developing a functional specification for a CAE application. It is directed to both CAE application users and developers. A common data model should be adopted, and existing procedures and organizational structures relative to the data model should be evaluated to successfully integrate CAE applications in the work environment.