Precision Measurement

Measuring to the precision the decision actually needs — no less, because a number too coarse misleads; no more, because a number too fine costs what it is not worth.

Precision is not accuracy and the two are confused constantly. Accuracy is closeness to the truth. Precision is fineness of resolution. A figure can be given to four decimal places and be wrong, and a rough figure can be right — and of the two failures, the precise wrong one is far more dangerous, because precision is read as confidence (Measurement · Truth · Data).

So the discipline has two edges. Under-measuring hides the thing you needed to see: a body that tracks nothing cannot tell the difference between its intentions and its conduct (Kept as a share of made · The gap · The Score). Over-measuring costs more than the decision is worth, and buys a false confidence with the cost — the deeper harm, because the body then acts on a number it has not earned (Waste · Bottom Line Up Front).

The rule that follows is simply: let the decision set the resolution. Ask what will be decided differently at each level of precision; where no decision changes, the extra precision is decoration. This is the same reasoning the canon applies to time, where the principle is already written — the clock is read rather than computed, and an estimate is said in words rather than dressed as a number it has not earned (The clock is read, never computed · Honesty about time · Measure everything, manage to the milestones).

It carries a companion discipline: a number travels with its provenance. How it was obtained, when, by whom, and whether it is a measurement or an estimate — because a figure separated from how it was made is indistinguishable from one that was invented (Provenance · Attribution · Second reader · Transparency).

And it does not replace judgment. A number informs a decision; it never makes one, and never a single-metric rule (Wisdom · Discernment · Advantage Based Decision Making).

Also called: appropriate precision Stands on: Measurement · Science · Data · Truth Opens onto: Honesty about time · The clock is read, never computed · Provenance · The Score · Measure everything, manage to the milestones · Waste · Wisdom · Pillar VIII — Sacred Science and Technology In play: the table — before anything is counted, the question of how finely it needs to be counted Sources: Precision Measurement (root page — ore: the file contains a title and nothing else) · Measurement (root page and Lexicon line) · the canon's own time and estimate conventions · lionsberg.wiki: Precision Measurement Open: First articulation. The canon names this and writes nothing; everything here is general understanding of measurement discipline aligned to the canon's existing rules about numbers and time, and it should be checked by someone who knows the measurement literature. · Inbound links were not counted.