20 Most Useful Formulas for Industrial Engineers in Apparel Industry

Industrial Engineering:
Industrial Engineering is concerned with the design, improvement and installation of integrated system of men, materials and equipment. The principle objective of industrial engineering is to increase the productivity by eliminating waste and non-value adding operations and improving the effective utilization of resources.

Industrial engineering can explain from the following equation:

Industrial Engineering (IE) = Production ↑ Cost ↓ Proper use of all elements ↑ Efficiency ↑ Profit ↑

Useful Formulas for Industrial Engineers in Apparel Industry

Industrial engineers, garment professionals frequently used different types of formula for measuring factory performance. Besides, Formula helps to get the result quicker and it specifically mentions. Following are the common formulas those are used by garment industry professionals. It will be very helpful for new comers in this industry.

                                  Total working minutes in a day x No. of manpower in a line x Line efficiency%
1. Daily Line Target = …………………………………..........................…………………......……….
                                                                         Garment SAM

2. Garments SMV = Basic time + (Basic time x Allowance)

                                                      Target per hour
3. Theoretical Manpower = …………….........…………………
                                               Process capacity per hour

                                                  Total working minutes in a day x line efficiency %
4. Individual operator target = ………………………......…….............…………………
                                                                      Operation SAM

                                               
  Total output x Operation SMV
5. Individual OP efficiency = ……………………………………….. ×100
                                                  
    Total working minute   

                                               Total number of output per day per line
6. Line Labor Productivity = ……………..............……………………….
                                                      Number of worker worked

                                                    Total number of output per day per line
7. Line Machine Productivity = ……………………………......................………….
                                                             Number of machines used

                                            Total output per day per line x SAM
8. Line Efficiency = ………………………………................................………… x 100
                                  Total operator per line x total working minutes per day

9. Standard Pitch Time (S.P.T) = Basic Pitch Time (B.P.T) + Allowances (%)

                                                         
  Total headcount  - No of machine operator
10. Factory direct & indirect ratio = …………………………………………………….
                                                               
       Total no of operators         

                                               
    Total salary of the labor in the month   
11. Labor cost per minute = ……………........…........…………………………………….
                                          
    Total SAM produce by those labors in that month    

                                                      
     No of machine assigned x Hourly target qty      
12. Estimated production per hour = …………………………………………………………….
                                                             
      Calculated no of machines           

                                                             
    Total minute in a shift x Line efficiency 
13. Estimated machine productivity = ………………………………………………………..
                                                                        
       Garments SMV          

                                   
      Worker potential production P.H - Current production pcs P.H     
14. Productivity Gap % = ………………….………...……..................………………………… ×100
                                                            
Current production pcs per hour      

                                                  Total cost incurred in production in a day
15. Production Cost pet unit = …………………………….....……………………
                                                     No. of garment produced in a day

                                                              
Total units produce by the line                
16. Machine productivity = …………......……..............................………………………..
                                             
Total no of machines use to produce those garments    

                                         Basic pis time
17. Factory efficiency = ………………….. x 100
                                        Bottle neck time

                                         Work hour
18. Factory capacity = …...........….......…. x Total worker x Working day x Efficiency
                                      Garments SMV

                                              
Total manpower    
19. Man & machine ratio = ………………………………
                                               
Total machine     

                                                      Target daily output
20. Required no of operator = ……………....……........…….
                                                   Daily output per operator