There is widespread reservation on categorizing quality attributes as critical & non-critical. In our opinion, this is based on impression that non-critical are not important and hence can be compromised. That is not the intended idea. Every quality attribute which defines the product is important and must meet its requirements as regards product realization & release is concerned.QbD is a live process, if during development it is observed that process variables have significant impact on a non-critical attribute, it can be redefined as critical for the process and the table revised. Remember, the classification is used as a management tool for development & quality system.
In the next article, we will discuss how CQAs are used to identify Critical Process Variables (CPP&CMA).