This report provides a complete guide to the stand alone mode operation of the reliability and maintenance (R&M) model, which was developed to facilitate the performance of design versus cost trade-offs within the digital avionics information system (DAIS) acquisition process. The features and structure of the model, its input data requirements, its logical operations, and its outputs are described; and instructions and format for preparing input data and for selecting output options are provided with sample output reports for each option that can be selected. Appendices include descriptions of input data elements and potential error messages, and a listing of acronyms used. (Author/CMV)