[en] The front-end analysis performed for the Nuclear Power Plant Maintenance Personnel Reliability Modeling Program consisted of three primary tasks which are addressed within this report. The first of these was a front-end user survey which investigated the need for and potential content of a structured methodology for nuclear power plant maintenance. For this survey, personal interviews and mail surveys were completed to collect the needed information. The second task of the front-end analysis assessed available human behavioral methodologies for applicability and adaptability potential for nuclear power plant maintenance activities. The third task of the front-end analysis was the development of a comprehensive program plan for the simulation model. The plan that was developed spans a 38-month period, and includes three phases: the model development phase, which will result in the release of a debugged/sensitivity tested/calibrated version of the model; the validation phase, which will result in the release of a validated version of the model; and the dissemination phase