Repeatability vs Reproducibility

Repeatability vs Reproducibility

1) Repeatability:

    → "Repeatability is the variation in measurements obtained :
         ➧ By one appraiser 
         ➧ with one measurement instrument
         ➧ when used several times
         ➧ while measuring the identical characteristic
         ➧ on the same part. "

Repeatability vs Reproducibility

 Examples of Repeatability:

The examples of Repeatability is mentioned below:
Repeatability vs Reproducibility

 Possible Causes of Poor Repeatability:

→ There are two Possible cause of Poor repeatability:
     [a] Equipment:
          ⧿ Instrument needs maintenance
          ⧿ The instrument needs to be more rigid
     [b] People:
          ⧿ Environmental condition (Lighting, Noise)
          ⧿ Physical Condition (Eyesight)



2) Reproducibility:

    → Reproducibility is the variation in the average of the measurements made
        ➧ by different appraisers 
        ➧ using the same measuring instrument
        ➧ when measuring the identical characteristic
        ➧ on the same part

Repeatability vs Reproducibility

 Possible Causes of Poor Reproducibility:

→ Measurement Procedure is not clear
→ The operator is not properly trained in using and reading gauge.
→ Operational definitions not established




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