IE_Lecture19-ed

IE_Lecture19-ed - Lecture 19 Industrial Ergonomics (ENGR...

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Lecture 19 Industrial Ergonomics (ENGR 3460U) Review of Design Principles structor: Dr Ahmad Barari Instructor: Dr. Ahmad Barari Barari- ENGR 3460U 1
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Design Principles for Visual Displays-1 • Digital vs. Analog? recision vs approximation – Precision vs. approximation – Exact value vs. trend – Watches??? Barari- ENGR 3460U 2
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Design Principles for Visual Displays-2 ixed scale, moving Fixed scale, moving pointer: best Moving scale, fixed ointer: not good po te ot good Barari- ENGR 3460U 3
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Design Principles for Visual Displays-2 Barari- ENGR 3460U 4
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Design Principles for Visual Displays-2 Barari- ENGR 3460U 5
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Design Principles for Visual Displays-3 Basic features of dial: cale: • Scale: – Major/minor tics rogression Progression – 10’s, 5’s – 2’s OK – 3’s never • Pointer – Pointed – Meets smallest tic Barari- ENGR 3460U 6 – Avoid parallax
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Design Principles for Visual Displays-4 Panel (bank of dials) design: •U s e patterns • Make deviant dial conspicuous • Extended lines/pointers Barari- ENGR 3460U 7
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Design Principles for Visual Displays-5 • Minimize informational load (Miller’s Rule) dicator lights • Indicator lights – Flashing creates arousal/attention – But flicker fusion rate (Movies 24/sec) Barari- ENGR 3460U 8
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Design Principles for Visual Displays-5 • Labels roper size: at 20 in eight at least 0 13“ Proper size: at 20 in. height at least 0.13 (3.25 mm), stroke width at least 0.02 in (0.55 mm),10 pt = 22 arc min (visual angle), but 1:6 stroke width/height ratio – One point: 0.35 mm or 1/72 inch – B on W for day, W on B for night (irradiation) – Mix upper and lower case – Warnings: bold and upper case Barari- ENGR 3460U 9
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Design Principles for Controls - 1 Control-response ratio= mount of control move amount of control move amount of response move ow C/R = high gain • Low C/R = high gain – coarse control igh C/R = low gain • High C/R = low gain – fine control ptimum C/R = best Optimum C/R = best response time travel time Barari- ENGR 3460U 10 adjust time
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Design Principles for Controls - 2 • Horizontal displays: Warrick’s principle = closest points on display & control move in same direction • Stick controls: up = increase, forward = increase?? • Different planes: CW = Barari- ENGR 3460U 11
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Auditory Displays (pp. 316-317) • Auditory signals for warnings : – Attention demanding ( RT) – When vision overburdened, moving about • Two-stage signals – Attention demanding (warning) – Precise information (speech) nvironmental factors Environmental factors – Low freq. (<1000 Hz) best ong distance less absorption Barari- ENGR 3460U 12 – Long distance, less absorption
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This note was uploaded on 10/18/2010 for the course ENGR 3360 taught by Professor Ahmadbarari during the Fall '10 term at UOIT.

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IE_Lecture19-ed - Lecture 19 Industrial Ergonomics (ENGR...

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