MIL-STD-46855 Human Engineering Requirements For Military Systems, Equipment, And FacilitiesThis standard establishes and defines the requirements for applying human engineering to the design, development, and acquisition of military systems, equipment, and facilities. These requirements include the work to be accomplished in conducting a human engineering effort integrated with the total system engineering and development effort. These requirements are the basis for including human engineering in proposals; system, equipment, software and associated user interfaces, and facility analysis, design and test; and documentation and reporting.

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MIL-STD-46855A

l. Feedback informing operator or maintainer of the adequacy of actions taken or the failure to take an action;

m. Tools and equipment required, and their timely availability;

n. Number of personnel required, their skills, and aptitude requirements;

o. Probability and severity of human error;

p. Potential for error recovery;

q. Job aids, training, or references required, and their timely availability;

r. Communications required, including type of communication;

s. Hazards involved;

t. Personnel interaction where more than one person is involved;

u. Performance limits of personnel;

v. Operational limits of hardware and software and associated user interfaces; and

w. Concurrent tasks and the associated potential workload and attention management issues.

The analysis shall be performed for all affected operational missions and phases including degraded modes of operation. Each critical task shall be analyzed to a level sufficient to identify operator and maintainer problem areas that can adversely affect mission accomplishment, and to evaluate proposed corrective action(s).

5.1.2.3 Conduct a workload analysis. Operator and maintainer (individual and team) workload analyses shall be performed and compared with performance criteria. To avoid overloading or underloading, the degree to which demands of any task or group of tasks tax the attention, capacities, and capabilities of system personnel (individually and as a team) and thus affect performance shall be evaluated. Sensory, cognitive, and physiological limitations shall be considered, as applicable. The workload analyses shall define operational sequences and task times. Preliminary workload estimates shall correlate required actions with team tasks for each task component (visual, auditory, motor, and cognitive) specified in terms of time, workload, mental effort, and psychological stress. A workload estimate for each individual shall be defined in a fashion permitting individual and team workload to be related to operational procedures.

5.1.2.4 Identify corrective action. Human-system interface design incompatibilities shall be corrected by changing the design or restructuring the tasks to ensure that degraded human performance does not result in degraded system performance.

5.1.2.5 Prepare timely updates. Analyses of tasks shall be modified as required to remain current with the design and development effort and shall be available to the procuring activity.

5.1.3 Select equipment. Human engineering principles and criteria shall be applied along with all other design requirements to identify and select the particular equipment to be operated, maintained, or controlled by personnel. The selection of equipment shall be based on the results of the functional, task, and workload analyses. Equipment selection shall be iteratively updated as the supporting analyses are updated. The selected design configuration shall reflect human