This effort is to develop the requirements and the subsequent design and implementation of a PC based analytical system for PBS justification; peace time and war time operational planning for the optimization of limited operational support aircraft assets. Phase I will consist of 1. Identifying relevant data elements which include aircraft cost, performance capability and critical demand model considerations. 2. Quantifying historic, current and projected demands. 3. Develop a data collection system. 4. Develop assessment algorithms. This will precede the development of a PC based system model for planning and execution use at all levels, i.e. Opnav, Navair, Tycom, Squadron.