AbstractFor Operational Research studies concerned with process operations, the collection of adequate data is necessary for the formulation of a model; subsequently, further data are required for the testing of the solution and finally the routine control of the solution will necessitate the setting-up of a permanent system of data collection and analysis. The necessity to improve on existing methods of data handling for all these purposes led to the development of an Automatic Performance Recorder. The basic logic of this equipment is described together with some practical examples of past and potential applications.