MAP-01-011 HFI Technical Guide - Human Factors Integration ...

MAP-01-011 – HFI Technical Guide (STGP 11)HFI Technical Issueslimits, task performance may be degraded or health and safety risks increasedunacceptably. Environmental Design focuses on the interaction betweenphysical environmental factors and human performance with regard to the designof equipment. The aim of Environmental Design is to identify the zone ofacceptability and relevant health and safety standards for each environmentalfactor. The acceptability zone is described by the ‘envelope’ defined by theminimum and maximum acceptable limits of ship motion, noise, vibration, climate,lighting and atmospheric contaminants, etc.13.1.2 StakeholdersA list of potential stakeholders for this area is given below. This list is notexhaustive and should be seen to be a guide only. HFI Foci should refine this listbased upon the structure of their project, the attendees at the relevant HFSG orHFWG and in light of guidance and requests from industry, DEC and Customer 2representatives.• DEC• INM• IPT HFI Foci• SSG-ShipDes13.1.3 Effects of Ambient and Task-Specific Factors on PerformanceTwo general types of environmental effect may influence the operationaleffectiveness of personnel. The general ambient conditions are determined bymotion, temperature, noise, illumination and so on which generally will affectoperator comfort, level of attention and fatigue. The performance of a specifictask or the operation of particular equipment is affected by an interaction with theenvironment, e.g. the effect of lighting on display legibility, the effect of motion onthe accuracy or speed of using an input device.Ship motion and vibration may affect the ease of using control devices oroperator speed and accuracy when entering data. The climate at a workstationor within a workspace will help to determine human comfort and may increaselevels of stress and affect physical and mental performance. Level of noise mayaffect the perception of auditory alerts and warnings and voice communications.The selection and design of displays and control devices must take into accountthe effects on performance of the full range of environmental factors. Illuminationis a specific concern as it may range from daylight conditions under which theeffects of glare must be accommodated to a range of lighting conditions withinclosed compartments.The project therefore needs to take into account the total effect of all theenvironmental conditions and their interaction with human activities. Specificguidance is available from standards about the detailed effect of such factors.This chapter summarises the environmental conditions that need to beconsidered during design. INM can provide specific advice if required.13.1.4 Habitability and Internal Environment FactorsThe main factors that affect habitability are as shown in Table 13-1 and aredrawn from INM TR 96004 ‘Habitability of Warships‘ [Ref 24].Nov 2006 Page 13-4 Issue 4