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An operation involves the following elements given below with their related data.
written 5.8 years ago by gravatar for ishandaftardar ishandaftardar • 170 modified 4.5 years ago by gravatar for prashantsaini prashantsaini • 0
Element Observed time(minutes) Rating Remarks
A 0.20 90 -
B 0.05 80 -
C 0.03 100 -
D 0.78 100 -
E 0.06 100 -
F 0.05 100 -
G 0.02 85 Once in 5 pieces
H 0.06 80 -
I 0.10 90 -
J 0.04 90 Once in 20 pieces

Assuming rest and personal allowances as 13% and contingency allowances as 2% calculate standard time of the job.
industrial engineering and management
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written 5.7 years ago by gravatar for ishandaftardar ishandaftardar • 170 •   modified 5.7 years ago

Normal time = Observed time x Rating

Standard time = Normal Time x [ Contingency Allowances + Rest and Personal Allowances ]

Element Observed time (in mins) Rating Frequency Normal Time [(Observed time x Rating)/ (Frequency x 100)]
A 0.20 90 1 0.18
B 0.05 80 1 0.04
C 0.03 100 1 0.003
D 0.78 100 1 0.078
E 0.06 100 1 0.006
F 0.05 100 1 0.005
G 0.02 85 1/5 0.002125
H 0.06 80 1 0.048
I 0.10 90 1 0.09
J 0.04 90 1/20 0.0018
Total 0.886 mins

Standard time = 0.886 x [ 0.13 + 0.02 ] mins = 0.886 x 0.15 mins

Standard time = 0.1329 mins per job
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