Implementer's Guides

​​​​​​​Implementer's ​guides (in force) under Study Group 12 responsibility​

An implementer's guide is an informative (non-normative) document​ which records all identified defects (e.g., typographical errors, editorial errors, ambiguities, omissions or inconsistencies, and technical errors) associated with a Recommendation or a set of Recommendations and their status of correction, from their identification to final resolution.
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NOTE – An implementer's guide is issued by ITU-T following agreement by a study group, or following agreement by a working party with the concurrence of the study group chairman. Typically, defect corrections are first collected in an implementer's guide and, at a time deemed appropriate by the study group, they are used to produce a corrigendum or are included as revisions to a Recommendation.​