A data processing system for analyzing customer and employee interactions in a service establishment is disclosed. The data processing system comprises a plurality of remote customer, employee units and a central unit. The units each include a transceiver to send and receive signals. The signals are all received by the central unit and relayed to the appropriate unit. The central unit time stamps and records all signals in a database. The system further comprises an evaluation program which analyzes the signal data to provide employee performance ratings and staffing recommendations.