Work System Design

Kiran Hanjar S
1MS12MIA03
II sem
MSRIT
*Allowances refers to extra time allowed, beyond

completion of the task itself
*Some allowances are necessary for health ...
Personal Allowances:
* Given for things such as going to restroom, drinking water,
smoking and so on
* Do not vary with th...
Fatigue factors are grouped into three categories:
Physical
* Carrying , lifting loads and force applied
* Static load (bo...
* Push :
weight (kg)
1-2
3-6
7-9
10-12
13-15
16-17
18-19
20

% allowances
10
11
12
13
14
15
16
17
* Carrying load:
weight (kg)
1-2
3-4
5-6
7-8
9-10
11
12-13
14-15
16
17
18
19
20

% allowances
10
11
12
13
14
15
16
17
18
1...
*

Lifting:

*

Weight (kg)
1
2
3-4
5-6
7
8
9
10
11
12
13
14
15-16
17
18
19
20

% allowances
10
11
12
13
14
15
16
17
18
19...
Sitting awkwardly

Activity

Standing or walking freely

10% allowances

Ascending or Descending
stairs

12%
allowances
Co...
Noise allowances:
Working in a quiet office, light assembly
works

10% allowances

Wood working machine shop

12% allowanc...
Operating steam hammer in forge

18% allowances

Road drilling

Riveting in shipyard
Vibration allowances

Shovelling light materials

12% allowances

Power drill (2 hands)

Power sewing machine

Drill opera...
Normal factory/office work

Inspection of easily visible faults

10% allowances
Intermittent inspection for
detailed fault...
Continuous visual inspection (cloth)

12% allowances

Engraving using an eyeglass
Dust

Office normal light assembly

Grinding or buffing

10% allowances

12% allowances

Finishing weld

Emptying ashes

1...
Unloading cement

Demolishing building

15% allowances

Running coke from hoppers 11
Dirt:

Stripping IC engine

Working under old vehicle

12% allowances

16% allowances
Coal mines, chimney sweep with brush...
Fumes :
12% allowances
Emulsion paint, gas cutting

Lathe turning with coolants

15% allowances
Moulder providing metal & ...
Time allowances
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Time allowances

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Suggests how much time allowances with respect to tasks carried out. An effective tool to be considered while performing Motion Time Measurements.

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Time allowances

  1. 1. Work System Design Kiran Hanjar S 1MS12MIA03 II sem MSRIT
  2. 2. *Allowances refers to extra time allowed, beyond completion of the task itself *Some allowances are necessary for health and long term efficiency (like rest breaks) *Others are pragmatically necessary, (like time for picking up dropped tools or consulting with supervisor) *Personal , Fatigue and Delay allowances
  3. 3. Personal Allowances: * Given for things such as going to restroom, drinking water, smoking and so on * Do not vary with the task * Values of 5%(24 minutes in a 480 minute day) Fatigue allowances: Compensate the person for the time lost due to fatigue In contrast to personal allowances, which are given to everyone, fatigue allowances are given only for cause Semiautomatic machines (Personal Allowances, delay Allowances and recover from fatigue)
  4. 4. Fatigue factors are grouped into three categories: Physical * Carrying , lifting loads and force applied * Static load (body posture) Mental Environmental * Dust , dirt and fumes
  5. 5. * Push : weight (kg) 1-2 3-6 7-9 10-12 13-15 16-17 18-19 20 % allowances 10 11 12 13 14 15 16 17
  6. 6. * Carrying load: weight (kg) 1-2 3-4 5-6 7-8 9-10 11 12-13 14-15 16 17 18 19 20 % allowances 10 11 12 13 14 15 16 17 18 19 20 21 22
  7. 7. * Lifting: * Weight (kg) 1 2 3-4 5-6 7 8 9 10 11 12 13 14 15-16 17 18 19 20 % allowances 10 11 12 13 14 15 16 17 18 19 21 22 24 26 27 28 30
  8. 8. Sitting awkwardly Activity Standing or walking freely 10% allowances Ascending or Descending stairs 12% allowances Coal mining with pickaxes shovelling to container
  9. 9. Noise allowances: Working in a quiet office, light assembly works 10% allowances Wood working machine shop 12% allowances Light machine shop, office or assembly shop were noise is distraction
  10. 10. Operating steam hammer in forge 18% allowances Road drilling Riveting in shipyard
  11. 11. Vibration allowances Shovelling light materials 12% allowances Power drill (2 hands) Power sewing machine Drill operated by one hand 14% allowances
  12. 12. Normal factory/office work Inspection of easily visible faults 10% allowances Intermittent inspection for detailed faults
  13. 13. Continuous visual inspection (cloth) 12% allowances Engraving using an eyeglass
  14. 14. Dust Office normal light assembly Grinding or buffing 10% allowances 12% allowances Finishing weld Emptying ashes 14% allowances
  15. 15. Unloading cement Demolishing building 15% allowances Running coke from hoppers 11
  16. 16. Dirt: Stripping IC engine Working under old vehicle 12% allowances 16% allowances Coal mines, chimney sweep with brushes
  17. 17. Fumes : 12% allowances Emulsion paint, gas cutting Lathe turning with coolants 15% allowances Moulder providing metal & filling mould

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