Index
The coherence index is the weighted average of the scores of the 6 gaps, with the weights from the instrument. It is reported only at tier 3, when all 4 perspectives have been measured. Calculated from a missing perspective, it would not be an approximation but a false figure, which is why the reason appears in its place.
How it enters the measurement
Platform material · not part of the published instrument
Each gap becomes a score from 0 to 100: those that aim for zero decrease with the distance, the position gaps decrease the further they move from the 5–35 band.
An example
Platform material · not part of the published instrument
A brand without the category survey has no index, even if the other 3 perspectives are measured: it is missing the norm.
Related terms
Platform material · not part of the published instrument
The method and the author
Platform material · not part of the published instrument
All the reference pages describe the same method: how ACM Framework measures a brand's coherence. The terms are explained in the glossary. The instrument is openly published, with DOI 10.5281/zenodo.22926708, by Dumitru Talmazan.