SAMPLING PROCEDURES FOR INSPECTION BY VARIABLES – PART 1: SPECIFICATION FOR SINGLE SAMPLING PLANS INDEXED BY ACCEPTANCE QUALITY LIMIT (AQL) FOR LOT-BY-LOT INSPECTION FOR A SINGLE QUALITY CHARACTERISTIC AND A SINGLE AQL (FIRST REVISION) (ISO 3951-1:2005, IDT)
This Malaysian Standard specifies an acceptance sampling system of single sampling plans for inspection by variables, in which the acceptability of a lot is implicitly determined from an estimate of the percentage of nonconforming items in the process, based on a random sample of items from the lot.
This Malaysian Standard is primarily designed for application under the following conditions:
a) where the inspection procedure is to be applied to a continuing series of lots of discrete products all supplied by one producer using one production process;
b) where only a single quality characteristic x of these products is taken into consideration, which must be measurable on a continuous scale;
c) where the measurement error is negligible, i.e. with a standard deviation no more than 10 % of the
process standard deviation;
d) where production is stable (under statistical control) and the quality characteristic x is distributed according to a normal distribution or a close approxi
