Critical Operations in Garment Production

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The term 'critical operation' is often used by quality personnel, line supervisors, technical personnel and industrial engineers in the garment factories. A critical operation is an operation where factory needs to take extra care than the rest of the operations of a style for various reasons.



Normally factories give more attention to an operation in following ways

  • 100% checking of garments and garment components - all garments must be checked at particular workstation
  • employ experienced and skilled worker  
  • design workstation where least skill is required from an operator to make quality and quantity- like use of guides and attachment to avoid defect generation and maintaining minimum production target

The term ‘Critical operations’ is commonly used as following -
  • Quality check points (inline quality checking station) are planned at critical operations to check all garment components (half stitched) prior to moving it to the next operation.
  • Machine and manpower requirement calculation for critical operations
  • Production target for the critical operations and
  • Maintaining WIP level at critical operations

Now the question is that ‘how to know the potential critical operations in advance in respect to quality and production’? Critical operations in a garment for quality aspects and production aspects may differ.

In this article, I will show you the common criteria to recognize critical operations in a style. Based on that you can make action plan in advance to avoid quality issues and production delays.

Critical operations: Quality point of views

When one looks for a critical operations in a garment from product quality point of views, he/she should look for
  • Defective prone operations: Kind of operations where defects are frequently occur (may be due to machine type) in certain part of the garment. In such operations plan for better equipment and machine. 
  • Operation prior to sub-assembly and assembly starts: To avoid excess rework and alteration, it is advised that always set a check point at the end operations of the part section. 
  • Operations in a critical zone of the garment - like chest pocket attaching, Zipper fly j-stitch, collar top stitch etc.
  • Sewing on bias cut - length of the seam get stretched when operator sews bias cut panels. Like sewing neck line and armhole.  

Critical operations: Production point of views

When operations are looked into production point of views, following operations are considered as critical operation -
  • an operation with higher work content compared to other operations. These operations are potential bottlenecks in case multiple workstation are not set in a line. Output at bottleneck operations need to be speed up for smooth flow of work in the line. 
  • an operation that is difficult to handle without guide and attachments. When operator sews more than two plies, add gather allowing differential feeding to plies by hand are critical operations.
  • Curve shape of the seam line, like set armhole, bottom hemming of curved hem
  • an operation that is made by special machine and difficult for alteration. 
I hope now you can easily identify a critical operation of a style.

You may be using a different criteria to define a critical operation. What are those?
In your factory, which all operations are considered as critical operations and why?

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Online Clothing Study: Critical Operations in Garment Production
Critical Operations in Garment Production
What is the critical operations in garments?
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