A convergence of ideas

If there is one compelling reason for equipment qualification, it lies within the 

Calibration is often confused with qualification. As pointed out by Parriott with reference to HPLC methods  

Calibration is, therefore, inextricably linked to equipment qualification and preventative maintenance. Whenever calibration involves adjustments of the type described above, it is important to document the activity and where appropriate re-qualify the instrument concerned. 

The purpose of this process is to confirm the viability of the method chosen and show that the procedure is sufficiently analytically robust to allow a preliminary validation to be carried out. The AOAC collaborative study guidelines explicitly state 

Experimentally designed trial within development laboratory 

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