Featured Products

About the AQL Inspector's Rule

he quick easy way to determine sample sizes and allowable defects.

With the increasing reliance on AQL inspection by attributes, a variety of people from Quality Assurance Engineers to Inspectors with minimum technical training using sampling plans based on the AQL standards: MIL-STD-105E, ANSI/ASQ Z1.4-2003 (R2013) or ISO 2859-1 (1999). The AQL Inspector's Rule is designed to provide this information in an easy to use format. Its growing popularity since it was first introduced in 1968 indicates it value.

The AQL Inspector's Rule's straight forward design saves times and reduces confusion. All the data is conveniently grouped so that the sampling plan can be read off instantly. The rule covers a wide range of AQL's (.065 to 15) with Normal, Tightened and Reduced inspection for both single and double sampling plans. It rigidly adheres to three inspection standards: MIL-STD-105E, ANSI/ASQC Z1.4-1993, ANSI/ASQ Z1.4-2003, ANSI/ASQ Z1.4-2008 and ISO 2859-1 (1999).

The AQL Inspector's Rule is based on inspection by attributes for use in sampling inspection, measuring, examination, testing or otherwise comparing the unit of production with specified requirements of continuous series of lots or batches. AQL sampling plans are used for, but not limited to, the following: Components, raw materials, end items, operations, materials in process, supplies in storage, maintenance operations, data or records and administrative procedures.

An AQL Inspection Manual comes with each AQL Inspector's Rule with information on AQL sampling and instructions on use of the rule and dictionary or terms. Besides being a time saving tool on the job, the AQL Inspector's Rule, combined with the manual makes a valuable training aid.


The AQL Inspector's Rule is now available in three versions:

  • ANSI English version. This is the original version of the AQL Inspector's Rule introduced in 1968. The Rule and Manual are both in English. This version conforms to standards:

  • ANSI Spanish version. The Spanish version of the AQL Inspector's Rule was inducted in July 1999 to support the growing worldwide use of the AQL Inspector's Rule. The Rule and Manual have both been translated into Spanish. This version conforms to standards:

  • ISO English version. The ISO version was introduced in August 2002 in response to the 1999 revision of the ISO 2859-1 standard. The revision changes made this standard diverge for the MIL-STD-105E and ANSI/ASQ Z1.4 standards. This version conforms to standard:
    • ISO 2859-1 (1999)


  • ANSI versions conforms to standards:
  • ISO version conforms to standards:
    • ISO 2859-1 (1999)
  • AQL Levels From .065 to 15
  • Normal, Tightened and Reduced Inspection levels.
  • Single and Double Sampling Plans
  • Inspection Levels I, II, III and S-1 to S-4
  • AQL Inspection Manual is Included