The AACODS checklist was designed by Jess Tyndall to enable evaluation and critical appraisal of grey literature and has the flexibility to be applied to a wide range of resources.

AACODS (Authority, Accuracy, Coverage, Objectivity, Date and Significance)

• Authority: Is the author credible?
• Accuracy: Is it supported by documented and authoritative references? Is there a clearly stated methodology? Is it 'in line' with other work on the same topic
• Coverage: Have limitations been imposed and are these stated clearly?
• Objectivity: Can bias be detected?
• Date: Can't find the date? Rule of the thumb is to avoid such material
• Significance: Is it relevant? Would it enrich or have an impact on your research?