Calculate the standard production per shift of 8 hours duration with the followings data:
Observed time per unit 5 minutes
Rating factor 120 %
Total allowances 33.33 of normal time.
Solution : Normal time per unit= Observed time / unit X rating factor
= 5X 120 /100= 6 minutes
Allowance = 33.33 of normal time
33.33X 6 / 100= 2 minutes
Standard time / unit = normal time / unit +Allowances
= 6+2= 8 minutes / unit
Standard production in shift of 8 hours
= 8X 60 / 8 = 60 units.