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A particular activity of shop floor consist of 3 elements. The allowances are expressed as percentage of the normal time.Calculate standard time for each of the activity from following data.
S.No. Element a b c
1 Observed time in minutes. 1 1.5 2
2 Rating factor 125% 120% 110%
3 Allowances 20% 15% 20%

Subject: Production Engineering and Robotics

Difficulty: Medium

Marks: 8 Marks

1 Answer
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Sr. No. Element Observed time in minutes Rating Basic time (Normal time)
1 a 1 125% 1 x (125/100) = 1.25 min
2 b 1.5 120% 1.5 x (120/100) = 1.8 min
3 c 2 110% 2 x (110/100) = 2.2 min

Total Normal time = 1.25 + 1.8 + 2.2 = 5.25 min

Allowances = % Allowance X Normal Time

For

a = (20/100 x 1.25) = 0.25 min

b = (15/100 x 1.8) = 0.27 min

c = (20/100 x 2.2) = 0.44 min

Standard time= Normal time + Allowances

For

a = 1.25 + 0.25 = 1.5 min

b = 1.8 + 0.27 = 2.07 min

c = 2.2 + 0.44 = 2.64 min

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