Although this is not part of the designated PRSD scheme many have found it a worthwhile exercise.
You may also have evidence that could be of use to you as a result of the Self-Evaluation carried out by your school. You will find The "School Self-Ealuation CD" produced by DENI and "Together Towards Improvement" document invaluable for this exercise.
NCSL (National College for School Leadership) has produced a very good document on Self Evaluation .
This document seeks to explore different models, tools and examples of schools' practice to
enable the reader to base method selection from an informed basis.