Analysis Techniques For Man-Machine Systems Design

NATO UNCLAS SIFTED1.-AC1243(Panel-8)TrRnVolume ICHAPTER 1INTRODUCTION TO SYSTEMS DESIGN ANDHUMAN ENGINEERING ANALYSES"We have to design equipment to take full advantage of the capabilities of our personneland we have to design equipment that will not overload, confuse or degrade personnelperformance in achieving mission objectives ... We have to reduce design-induced humanerror which is so costly a component of accidents and operational failures. We have to planfor the wise and judicious use of the limited personnel and skill levels available to us bvoptimizing manpower requirement, and through more effective use of automation andexpert systems. We have to design with greater efficiency and productivity inDrder toreduce costs to our services and to our nations."Rear Admiral R. Horne. USN, 19901.1 INTRODUCTION1. For a long time, humans have manufactured devices. equipment. and systems whichpermit the accomplishment of activities, whether work or combat, to satisfv increasinglydemanding and complex objectives with increasing effectiveness and reliability. Up to the end ofthe 19th century, almost all manufactured items were made to measure by craftsmen who tailoredthe product to the user. The development of industrialization and the mass production of objectshas forced manufacturers to make identical items for effective use bv a large number ofindividuals. Today, the achievement of a specific objective often requires the efforts of severalgroups of individuals using several complex machines, some automatic, in a formal organization.Today, it is not possible to manufacture complex objects such as weapons without consideringthem as systems, defined as "the ensemble of.elements capable of achieving a goal or a missionwith autonomy" (Dictionaire Robert).( re s o u uresorcnd social envrnenFigure 1.1:Three interacting sets of system resourcesN A TO TTMCT. ASS TFTED