Data material, mean exposure, and exposure variability at job and task levels for car mechanics
| Job | Engine room | Break Waiting time Testrun | Brakes | Suspension | Brake pipes Dashboard Airbag | Wheels Tyres | Door lock New car Lights | Clutch Gearbox Drive shafts | Unspecified | Electronics | Seats Comfort | Tow-bar | Change of oil | Exhaust | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| All tasks occurring in the diaries are shown, ordered according to decreasing proportion of daily measurement time. The task category “unspecified” was formed a posteriori for periods with insufficient task information. | |||||||||||||||
| sBS2, sBD2, variance between subjects and between days (within subject), respectively. | |||||||||||||||
| Data material | |||||||||||||||
| Subjects | 23 | 23 | 23 | 19 | 15 | 16 | 18 | 16 | 9 | 7 | 12 | 10 | 8 | 14 | 3 |
| Days/subject | 4 | 2.9 | 3.9 | 1.9 | 1.6 | 2.1 | 2.3 | 2.1 | 1.6 | 2 | 2.3 | 1.8 | 1.4 | 2 | 1 |
| % of daily measurement time | |||||||||||||||
| Mean | 100 | 20.0 | 17.8 | 9.8 | 8.1 | 7.0 | 6.4 | 5.9 | 5.5 | 5.3 | 4.6 | 3.9 | 2.6 | 2.4 | 0.7 |
| Range | 0–98.4 | 0–50.2 | 0–86.2 | 0–90.6 | 0–64.7 | 0–48.2 | 0–77.1 | 0–87.4 | 0–67.3 | 0–43.3 | 0–40.4 | 0–67.8 | 0–39.1 | 0–28.7 | |
| Exposure variables | |||||||||||||||
| % time >90° | |||||||||||||||
| Mean | 4.7 | 3.9 | 1.3 | 4.6 | 9.0 | 5.7 | 2.8 | 3.7 | 11.9 | 5.0 | 4.1 | 4.0 | 5.7 | 6.5 | 5.4 |
| varBS | 2.9 | 2.2 | 0.5 | 3.9 | 23.8 | 0.9 | 2.1 | 9.2 | 93.0 | 22.5 | 6.6 | 0.7 | 19.1 | 8.5 | 19.5 |
| varBD | 4.2 | 19.6 | 1.1 | 6.1 | 13.9 | 33.3 | 10.3 | 8.5 | 5.6 | 1.9 | 14.1 | 32.0 | 3.3 | 24.7 | – |
| % time >90° at least 5 seconds | |||||||||||||||
| Mean | 3.4 | 2.9 | 0.6 | 3.2 | 6.5 | 4.4 | 1.8 | 2.4 | 9.8 | 3.8 | 2.8 | 2.9 | 3.9 | 5.0 | 4.2 |
| varBS | 1.5 | 1.2 | 0.2 | 2.2 | 15.6 | 0 | 0.9 | 5.0 | 70.8 | 19.5 | 7.7 | 1.1 | 4.5 | 6.4 | 18.4 |
| varBD | 3.3 | 16.0 | 0.6 | 5.3 | 7.9 | 29.3 | 6.7 | 5.9 | 5.9 | 1.1 | 6.2 | 29.3 | 2.9 | 20.8 | – |