Types of Sampling Plans for QC Inspections
The main purpose of inspection is to know about the lot of garments to be granted or rejected. How many sample would be collected from a lot will be the aim of sampling plan. Also informed that, if more sample would be inspected needs more time and cost. This article has shown various types of sampling method which are vastly followed during inspection in readymade garments industry.
Various Methods of Inspection Systems for Apparels:
- No inspection,
- 100% Inspection,
- Spot checking,
- Arbitrary sampling,
- Acceptance sampling.
All the above sampling methods have discussed in the following:
1. No inspection:
2. 100% Inspection:
Hundred percent (100%) inspection means every unit must be inspected. In this system, it is decided about the every unit would be granted or rejected instead the lot of garments to be granted or reject ted. It can have an idea about the quality of garments by this system. It is also informed that, all the defects are identified by 100% inspection. Also informed that, if 100% inspections is done then needs more time and cost.
3. Spot checking:
4. Arbitrary sampling:
This type of system is most popular and widely used in apparel manufacturing sector. Whatever the lot size is, 10% sample of the lot is collected and inspected and will decide the lot of garments to be granted or rejected. Both the advantages and disadvantages are found by applying this method.
5. Acceptance sampling:
In this system, samples are collected and inspected by statistically from the lot size and will decide the lot of garments to be granted or rejected. This system is used for inspection of raw materials before garments production, in production period, and for finished garments after production. This method is widely used and internationally recognized and accepted. There are a lot of advantages and disadvantages are found in this system. Most useful advantage of this system is controllable and minimum risk of accepting wrong decision. This system for inspection is more practical and economical.
Merchandiser at Fashion Xpress Buying House.
Badda, Dhaka, Bangladesh.