Continuous improvement · The measurement · Element
The baseline
The reading before the change, over a period long enough to be representative.
The part
What it is
A single day’s reading is not a baseline. Enough periods to see the normal variation is the minimum.
The baseline must be taken before the change is announced, since announcement alone changes behaviour.
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.