By B. Shackel (Auth.)
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Additional info for Applied Ergonomics Handbook. Volume 1
By 'body size' is meant, therefore, not just height but any body measurement which is important for the work space being designed. To design a work space properly the range of sizes of the user population must be known. The users of a piece of equipment may form a large group, such as 'all men' (for example, heavy vehicle drivers) or 'all men, women and older teenagers' (for example, private car drivers) or they may be a more restricted group, such as 'older men' (for example diesel locomotive drivers).
4 The areas that can be reached by all body sizes in a user population are far smaller than the areas that can be reached by one person. The common comfort area for gripping a steering wheel is indicated by the shaded area. SOmm [2"J minimum clearance for jolts 1 Q2Qmm [40-16'lmax range-no slump 978mm [ 38-5'1 9 7 - 5 ° ^ t i l e - n o slump ^ J « 50°A>tile78Qmm [31-5 ' ] no slump 685mm [ 2 7 ' ] 2-5% tile with 2'slump 3 Q % So Maximum height for shoulder movement Minimum thoracic support uinnnrt for relaxing -» n ri.
3c). This latter solution shows that satisfying ergonomics requirements does not constrain the designer unduly nor compel an identical result for similar problems — a possibility which has been found to cause industrial designers some concern. Some general suggestions If the panel contains a large number of dials, the user may have difficulty in picking out the one he wants. 4). 5). Experiments have shown that such a panel of dials can be checked more quickly than the usual 'haphazard' arrangement; indeed, as much as an 800% improvement in speed of checking has been proved.