Repeatability vs Reproducibility  What is the difference between Repeatability and Reproducibility

Repeatability vs Reproducibility | What is the difference between Repeatability and Reproducibility?

1) What is the difference between Repeatability and Reproducibility?

→ The difference is explained below.


2) Repeatability:

    → It 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
         ➧ in the same environmental condition
         ➧ repetition over a short period of time


Repeatability

➤ Examples of Repeatability:

The examples are mentioned below:


Examples of Repeatability

 Possible Causes of Poor Repeatability:

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



3) Reproducibility:

    → It 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

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