Maintenance · The downtime record · Element
The causes
Why each stop happened, in categories that can be counted.
The part
What it is
Free-text causes cannot be aggregated, which is why most downtime data is collected and never analysed.
The category set should be short enough that people use it consistently and specific enough to be actionable.
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.