In order to meet current compliance expectations, an analytical method used to support
GMP activities must be suitable for its intended use, and appropriate experimental work
must be documented that provides this assurance. The demonstration of method suitability
can be divided into two sets of activities: qualification and validation. When methods are new, under development, or subject to process or method changes, this activity is often
called qualification, while more formal confirmation of method suitability for commercial
applications is called validation (Ritter, Advant et al. 2004; Apostol and Kelner 2008; Apostol
and Kelner 2008).