How does one justify any other review methodology.

Praveen - it sounds like you are asking this question from the point of view of a systematic review leading to the application of a research project - as opposed to an exercise on its own for publication. You have correctly identified that one important reason to conduct an SLR is to assist in the formulation of research questions, statement or hypotheses. In order to do this, the SLR is primarily conducted to identify the current topic 'state of affairs' and identify any knowledge gaps. From here, the questions can be formulated and, at the same time, the methodology can be determined. Again, the SLR helps to determine the methodological gap. If one considers the importance of research questions and the adopted choice of methodology, to explore those questions, then it highlights the importance of the place of a comprehensive and rigorous review process - both as critical searching and critical appraisal processes.

The attached chapter may assist as the principles are generic.

Thank you Dean Whitehead

I am going to look at it now.

Regards