This thesis provides a comprehensive procedures manual and users guide which will enable both current users and beginners to understand and employ Version 2.0 of the Cost Effectiveness Analysis model CEAMOD, which is written in EXCEL spreadsheet software, in their services aircraft engine Component Improvement Programs CIP. The purpose of the CEAMOD is to project the possible savings which would be achieved from an Engineering Change Proposals ECP implementation. The thesis begins by describing the models background, basic assumptions, and format. Next, a detailed description of each page and the cell formulas used in each column of the spreadsheet are provided. A getting started users guide was also created to provide the user with the basic information necessary to actually use the CEA DeckEXCEL spreadsheet software. An example of each page of the CEA model is provided as well as the Standard History File fleet input pages. Cost effectiveness analysis, Component Improvement Program, Aircraft engines, Users manual, Cost-benefit analysis.