Discuss methodological congruence. Address:

a. Adequate documentation of participants
b. Procedural rigor: study assumption articulated? Trust? Open dialogue?
c. Adherence to ethical standards?
d. Auditability sufficiently described?
Do not need Introduction and Conclusion. Just discuss the questions above.

You may use as a reference this file: http://keiranhenderson.com/articulate/Critiquing_research/data/downloads/critiquing_qualitative_research_bjn.pdf

Use simple language.