A Comparison of Three Workload Methodologies: POP, IP/PCT, and POPIP

Abstract

This paper examines three of the Integrated Performance Modelling Environment's built-in workload methodologies: Prediction of Operator Performance (POP), Information Processing/Perceptual Control Theory (IP/PCT), and POPIP. The newly-implemented POPIP is compared to its forerunner methodologies, POP and IP/PCT. POP, developed by QinetiQ, predicts performance degradation from interference between concurrent tasks using estimates of workload on different channels. IP/PCT, developed by DRDC Toronto, theorizes that all factors that impact human cognitive workload can be reduced to their effects on the amount of information to be processed, and the amount of time available before the task must be completed. POPIP uses components from both POP and IP/PCT for a combined workload algorithm that offers interference based on time pressure, and task scheduling. A sample IPME model is discussed, and used as an example in comparing all three workload methodologies.