The training requirements analysis model (TRAMOD) described in this report represents an important portion of the larger effort called the Digital Avionics Information System (DAIS) Life Cycle Cost (LCC) Study. TRAMOD is the second of three models that comprise an LCC impact modeling system for use in the early stages of system development. As part of the overall modeling system, the training model is an efficient tool for developing training programs on the basis of task, time, and resources criteria. This report explains the approach used in developing this model and its analytic value as a method for determining training requirements, as well as the methodology used to develop the task-related characteristic data necessary for its application to the DAIS. The model is described by explaining the techniques and algorithms used to accomplish its function, and the task dictionary, task characteristic parameters/values, and acronyms are provided in appendices. A bibliography is included. (Author/JD)