TABLE OF CONTENTS Requirements analysis should be developed from a baseline mission scenario. Analysis should include application of HE methods as follows.
The functions that must be performed by the system in achieving its objective(s) within specified mission environments should be analyzed. HE principles and criteria should be applied to specify human-system performance requirements for system operation, maintenance, and control functions, and to allocate system functions to automated operation/maintenance, manual operation/maintenance, or some combination thereof. Function allocation is an iterative process continued until the level of detail appropriate for the level of system definition is reached.
Analyses should be performed to determine the basic information flow and processing required to accomplish the system objective. These analyses should include decisions and operations without assuming any specific machine implementation or predetermined level of human involvement.
Plausible human roles in the system (e.g., operator, maintainer, programmer, decision-maker, communicator, or monitor) should be identified. Estimates of processing capability in terms of workload, accuracy, rate, and time delay should be prepared for each potential operator/maintainer information-processing function. Comparable estimates of equipment capability should also be made. These estimates should be used initially in determining the allocation of functions and should later be refined at appropriate times for use in defining operator/maintainer information requirements and control, display, and communication requirements. In addition, estimates should be made of how implementing or not implementing HE design recommendations is likely...
