### Some Essential Formula and Example for Industrial Engineer (IE)

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