ISIS operates seven Facility Access Panels (FAPs) to peer review all beamtime proposals.
Panels meet twice a year, in June and December. Proposals are ranked on a scale from 10 (world class) to 1(unsatisfactory).
The work of panel members is covered by the Seven Principles of Public Life set out by the UK government.
In particular, panel members must declare all conflicts of interest and are expected to leave the room during discussion of proposals from their own departments or proposals with which they are associated.
FAP panel members are selected from academia and industry. Up to two ISIS representatives act as secretaries and give technical advice, but are not involved in the experiment review process.