This page has been self-evaluated by the authors. The grade is Not graded.
Possible grades:
Unstructured: The page does not have a proper structure and/or estimate.
Placeholder: a first draft of the thing. The estimate or description is not reliable at all, but its usefulness is in the fact that the page is structured in the right way and it can now be used as a part of a whole.
Preliminary: an estimate based on maybe one piece of evidence. Reliability has not been evaluated.
Draft: an estimate based on several independent pieces of evidence. Reliability of at least some pieces is considered adequate.
Review: an estimate based on a systematic literature review and a formal method to derive a result based on the evidence.