Table 3 Physical Exposure at the task level (measurements/observations in the field (m) and from videotape analysis (v))
Variable | Measurement |
|---|---|
Cycle Time (seconds) | SI definition (v) |
Force | Analyst DUE force rating (Borg CR-10) (1) Peak force (m), (2) Typical force (m), (3) Overall force (m), analyst judgment (Moore and Garg, 1995) (4) Overall force using an algorithm (Garg and Kapellusch) |
Worker DUE force rating (Borg CR-10) (5) Peak force (m), (6) Typical force (m) | |
Matching force) (7) Grip force (m), (8) Pinch force (m), (9) Thrust force | |
Measurement of weights and forces (10) Object/tool weight and Center mass offset (m), (11) Pushing/pulling force (m) | |
Repetition | (1) HAL Rating (v) (Latko 1997) |
(2) No. of exertions/min (SI) (v) (Moore and Garg 1995) | |
Duration of Exertion | (1) % duration of exertion (v) (Moore and Garg, 1995) |
(2) Total duration of exertion (seconds/min) (v) | |
Exposure/day (hours) | Supervisor/worker (m) |
Hand/wrist Posture | Posture categories (v) |
(1) Wrist flexion: <30, 30-50, >50 | |
(2) Wrist extension: <30, 30-50, >50 | |
(3) Ulnar deviation: <10, 10-25, >25 | |
(4) Radial deviation: <5, 5-25 | |
(5) No. of exertions in each category | |
(6) % of cycle time in each category | |
(7) Peak force posture categories | |
(8) Overall SI posture (Moore and Garg, 1995) | |
Elbow Posture | (1) Extension (v) (a) < 70 and (b) > 135 |
(2) No. of exertions (v) | |
(3) % cycle time (v) | |
(4) Forearm position (v): (Neutral, prone, supine) | |
Speed of work | Using the Strain Index method (Moore and Garg, 1995). |
Forearm Rotation | % of cycle time with forearm rotation (v) > 45 |
Grip/pinch | (1) Type of grasp (v): (a) power, (b) oblique, (c) palmer grip, (d) hook grip |
(2) Type of pinch (v): (a) palmer pinch, (b) -point, 2-point, (c) lateral, (d) 2-finger scissor; | |
(3) Grip/pinch span (v) | |
(4) % cycle time in each type of grasp/pinch (v) | |
Localized Mechanical Compression | (1) Body part (v) |
(2) Category (v): (a) Negligible, (b) moderate, (c) severe) | |
(3)No. of exertions/min.(v) | |
(4)% of cycle time(s) (v) | |
Hand as hammer | (1) Category (v): (a) Negligible, (b) moderate, (c) severe) |
(2) No. of exertions/min.(v) | |
Tool kicks | (1) Category (v): (a) Negligible, (b) moderate, (c) severe) |
(2) No. of exertions/min.(v) | |
Gloves | (1) Type (m) |
(2) Fit (m) | |
Exposure to hand/arm vibration | % of cycle time spent in (a) negligible, (b) visible and (c) severe hand/arm vibration |