Reading the signal · The weighting · Element
The severity
What it costs when it happens.
The part
What it is
To the customer in effort and to the organisation in support contacts, churn or lost revenue.
Estimated roughly. Precision is unnecessary and the ordering is what matters.
The smallest level
The attributes it carries
Each attribute is one of the framework’s shared types. What a date is, and how it is written, is defined once for the whole model — the note here says what it means in this particular place.