Since many small and medium sized enterprises have lack of funds to install the full scale Computer Aided Process Planning this study has been attempted to develop a part of computer generated production information system for a start. The system is programmed by DBASE III and BASIC languages for the IBM-PC competables for the sake of user's convenience. The system consisted of four major parts. The first part is a computerized work measurement system for applying WF predetermined time standards. The second part is a computerized forecasting and loading system for applying various statistical techniques. The third part is a GT scheduling system programmed by BASIC for applying heuristic scheduling method. Finally, the last part is a simulation system for GT scheduling efficiency test which is programmed by SIMAN simulation language