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Some Important Formula & Example for IE
1. Standard Pitch Time (S.P.T) = Basic Pitch Time (B.P.T) + Allowances (%)
- GSD = (Man power * Work hour) / Target
- SMV = Basic time + (Basic time * Allowance)
- Basic time = Observed time * Rating
- Observed time = Total Cycle time / No of cycle
- Rating = (Observed Rating * Standard rating) / Standard rating
- Efficiency = (Earn minute * Available minute) * 100
- Earn minute = No of Pc’s (Production) * Garments SMV
- Available minute = Work hour * Manpower
- Organization Efficiency = (Basic pis time / Bottle neck time) * 100
- Basic pis time = Total GMT SMV / Total Manpower
- UCL = Basic pis time / Organization Efficiency
- LCL = 2 * Basic pis time – UCL
- Capacity = 60 / Capacity time in minute
- Cycle Time = 60 / Team target
- Capacity Achievable = Capacity * Balance
- Daily output = Work hour / SMV
- Factory capacity = (Work hour / SMV) * Total worker * Working day * Efficiency
- CPM = (Total over head cost of the month / No of SMV earners * Work minutes) *Efficiency
- Required no of operator = Target daily output / Daily output per operator
Example:
1. Efficiency = Output/Input
= (SMV*Product Quantity) / (Worker*Working Hour*60)
= [(38.50*700) / (60*10*60)]*100
= 74% (Line Efficiency)
Here,
SMV=38.50
Working hour=10
No. of worker=60
2. Target/hour = (60/SMV)*Efficiency%
= (60/0.85)*70%
= 50 pcs/hour
Here,
SMV=0.85
Efficiency=70%
3. Target/line = [(No of worker*working hour*60)/SMV]*Efficiency%
= [(75*10*60)/23.5]*60%
= 1150 pcs
Here,
No of workers=75
Working hours=10
SMV=23.5
Efficiency=60%
4. Required days for the schedule = Total order quantity/Average target
= 50000/2000
=25
Here,
Average target=2000
Order quantity=50000
5. CM of garments= (Total Production)/(no of worker*work hour)
= 250000/(1500*10)
=1.66 BDT
Here,
Total Production=250000
No of workers= 1500
6. Factory capacity = [(Work hour*total workers*working day*60)/SMV]*Efficiency
= [(10*1500*26*60)/14.13]*55%
= 828025 pcs/month
7. Line GSD/day = (Manpower*work hour)/target
= (50*10*60)/900
= 33
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