Maximum data handling analysis load - Metrology & Quality Control

Discussion

• Sravanthi   -Posted on 27 Oct 15
  - Sampling plan is defined as detailed outline of measurements to be taken.
  
  - Sampling plan is classified into four categories such as:
  
  1) Single sampling plan – In this method, decision to accept or reject a lot depends upon single sampling inspection. It has high inspection cost and large sample size.
  
  2) Double sampling plan - In this method, decision to accept or reject a lot is based on inspecting two samples of size n1 and n2. Inspection load variation of double sampling plan depends upon the results obtained from first sample.
  
  3) Multiple sampling plan – The inspection cost for double sampling is lower than single sampling plans. Thus the inspection cost can be reduced by designing tripe or quadruple sampling plan. The average amount of sampling required is less for double sampling when compared with single plans, if the lot quality is same.
  
  4) Sequential sampling plan – This sampling plan contains multiple samples of one item or a small group. These have very low inspection cost and has highly variable inspection load. Sequential sampling plan has maximum data analysis load.
  

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