time allowances
Post on 19-Jan-2015
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Work System DesignTIME
ALLOWANCESKiran Hanjar S1MS12MIA03II semMSRIT
ALLOWANCES*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
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)
Fatigue allowancesFatigue factors are grouped into three categories:
Physical
*Carrying , lifting loads and force applied
*Static load (body posture)
Mental
Environmental
*Dust , dirt and fumes
Carrying ,lifting and body force allowances
*Push :
weight (kg) % allowances
1-2 10
3-6 11
7-9 12
10-12 13
13-15 14
16-17 15
18-19 16
20 17
Contd…* Carrying load:
weight (kg) % allowances
1-2 10
3-4 11
5-6 12
7-8 13
9-10 14
11 15
12-13 16
14-15 17
16 18
17 19
18 20
19 21
20 22
Contd…
* Lifting:
* Weight (kg) % allowances
1 10
2 11
3-4 12
5-6 13
7 14
8 15
9 16
10 17
11 18
12 19
13 21
14 22
15-16 24
17 26
18 27
19 28
20 30
Posture allowances
Sitting awkwardly Standing or walking freely Ascending or Descending stairs10%
allowances
shovelling to containerCoal mining with pickaxes
12% allowances
Activity
Environmental
Noise allowances:Working in a quiet office, light assembly works
Light machine shop, office or assembly shop were noise is distraction
Wood working machine shop
10% allowances
12% allowances
Operating steam hammer in forge
Riveting in shipyard
Road drilling
18% allowances
Vibration allowances
Shovelling light materials Power sewing machine
Drill operated by one handPower drill (2 hands)
12% allowances
14% allowances
Eye strain allowance
Normal factory/office work Inspection of easily visible faults
Intermittent inspection for detailed faults
10% allowances
Engraving using an eyeglass
Continuous visual inspection (cloth)
12% allowances
Dust, Dirt and Fume allowance
Office normal light assembly Grinding or buffing
Emptying ashesFinishing weld
Dust
10% allowances
12% allowances
14% allowances
Demolishing building
Running coke from hoppers 11
Unloading cement
15% allowances
Dirt:
Stripping IC engine Working under old vehicle
Coal mines, chimney sweep with brushes
12% allowances
16% allowances
Fumes :
Lathe turning with coolantsEmulsion paint, gas cutting
Moulder providing metal & filling mould
12% allowances
15% allowances
Thank You
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