If worker takes 15 min as a standard time for as job in which total allowance is 20% of normal time. If the rating of the worker is 100 %. Find the actual time required by the worker
Standard Time (ST) = 15 Minutes
Rating Factor (RF) = 100 %
Allowance = 20 % of Normal Time (NT)
Standard Time (ST) = Normal Time (NT) + Allowance
15 = NT + (20/100) NT
15 = NT + (1 + 0.2)
NT = 15/1.2
NT = 12.5 Minutes = Basic Time (BT)
We Know That,
Basic Time = (Observed (Actual) Time x Rating Factor)/ 100
12.5 = (Observed (Actual) Time x 100)/ 100
12.5 = Observed (Actual) Time
Actual (Observed) Time (AT) required by the worker to complete the job is 12.5 Minutes.