How closely a counting result agrees with the reference count.
Also called: count accuracy; tablet counting accuracy; counting precision.
What does counting accuracy measure?
First identify the result being compared with a reference: an individual product count, a complete bottle or an inspection decision. Formal metrology uses accuracy for closeness of agreement, while commercial specifications may attach a percentage to a particular bottle or detection outcome.
A percentage is interpretable only when its numerator, denominator, counted unit and test conditions are stated. Also distinguish results for all bottles checked from results only for bottles released after rejection.
Yes. Overfilled and underfilled bottles can offset each other in an aggregate total. That arithmetic does not establish that individual bottles meet the target count.
Are accurate detection and reliable rejection the same?
No. Product presentation, count detection and physical bottle rejection are separate functions. Detection identifies an event; rejection must act on the corresponding bottle. Evidence of one function does not establish the capability of the others.
Repeatable results also need not agree with the reference. A useful report separates count error, correctly filled bottles, false accepts, false rejects and physical reject confirmation, rather than compressing them into one unexplained accuracy claim.