Average Quantity System
In 2015 APLMF agreed to summarise the test procedures used in each APLMF training course and then to survey its members to validate the test procedures and to provide some quality control. The validated test procedures will be later used to develop eLearning modules.
The summary test procedures are provided to guide economies wishing to follow OIML recommendations. They contain abbreviated terms and formulae which are defined in the relevant OIML recommendation.
Information relating to an Average quantity system:
The summary test procedures are provided to guide economies wishing to follow OIML recommendations. They contain abbreviated terms and formulae which are defined in the relevant OIML recommendation.
Information relating to an Average quantity system:
SUMMARY OF TEST PROCEDURES USED FOR AN AVERAGE QUANTITY SYSTEM
These test procedures are based on OIML R87 (2017 version).
Test Name 
Procedures Description 
Define the inspection lot 
Determine the inspection lot to be sampled using random sampling in accordance with Clause 4.4 of OIML R 87. 
Determining the appropriate sample size 
Determine a sample size appropriate for the inspection lot from Column 2 of Table 2 within OIML R 87. 
Determining the appropriate sample size using the Stepwise sampling plan 
Determine a sample size appropriate for the inspection lot from Annex H within OIML R 87. 
Determine the appropriate T1 and T2 values 
Determine the tolerable deficiency (T) appropriate for the nominal quantity of the prepackages, according to Clause 3.4 and Table 1 within OIML R 87. 
Determine the number of prepackages allowed to exceed the tolerable deficiency 
Determine the number of prepackages allowed to exceed the tolerable deficiency from Column 3 of Table 2 of OIML R 87. 
Determine the average tare mass 
Determine the Average Tare Mass (ATM) by using the procedures in Annex B of OIML R 87. 
Determine the individual prepackage error 
Determine the actual quantity of the product and subtract from it the nominal quantity (Qn) of product to calculate the individual prepackage error, as per Clause 2.1.2.2 of OIML R 87. 
Determine if the test results meet the individual prepackage requirements 
Compare each negative individual prepackage error obtained to the values for T. 1) Reject the lot if the number of prepackages having a T1 error is larger than the number in Column 3 of Table 2, as per 4.3.2 of OIML R 87, and / or 2) Reject the lot if the number of prepackages having a T2 error is larger than zero, as per 4.3.3 of OIML R 87, the sample fails. 
Determine if the test results meet the average prepackage requirement 
If the average actual quantity of all prepackages, after the Sample Correction Factor (SCF) (Column 4 of Table 2) is applied, is less than the nominal quantity of the prepackages being sampled, the sample fails (see 3.2 of OIML R 87) 
Determine the number of prepackages allowed to exceed the tolerable deficiency 
Determine the number of prepackages allowed to exceed the tolerable deficiency from column 3 of Table 2 of OIML R87. 
Determine the average tare weight 
Determine the average tare weight by using the procedures in Annex B of OIML R 87. 
Determine the individual prepackage error 
Determine the actual quantity of the product and subtract from it the nominal quantity (Qn) of product to calculate the individual prepackage error. 
These test procedures are based on OIML R87 (2004 version).
Test Name 
Procedures Description 
Define the inspection lot 
Determine the inspection lot to be sampled using random sampling in accordance with clause 4.2 within OIML R 87. 
Determining the appropriate sample size 
Determine a sample size appropriate for the inspection lot from column 1 of Table 1 within OIML R 87. 
Determine the appropriate T1 and T2 values 
Determine the tolerable deficiency (T) appropriate for the nominal quantity of the prepackages according to 4.2.3 within OIML R 87. 
Determine the number of prepackages allowed to exceed the tolerable deficiency 
Determine the number of prepackages allowed to exceed the tolerable deficiency from column 4 of Table 1 of OIML R87. 
Determine the average tare weight 
Determine the average tare weight by using the procedures in Annex B of OIML R 87. 
Determine the individual prepackage error 
Determine the actual quantity of the product and subtract from it the nominal quantity (Qn) of product to calculate the individual prepackage error. 
Determine if the test results meet the individual prepackage requirements 
Compare each negative individual prepackage error obtained to the values for T. 1) If the number of inadequate prepackages exceeds the total permitted in column 4 of Table 1 of OIML R 87, And / Or 2) If any inadequate prepackage with a negative individual prepackage error greater than T2 (see 2.4 of OIML R 87) is found, the sample fails 
Determine if the test results meet the average prepackage requirement 
If the average of all prepackage errors plus the Sample Error Limit (correction factor) is less than the nominal quantity of the prepackages being sampled, the sample fails. (see 3.1 of OIML R 87) 
SUMMARY OF ECONOMY REPORTS
MEDEA Project: Training Course on Prepackaged Goods. Held in Nanning, PR China from 1013 April 2018.
Summary of economy reports can be downloaded here.
Summary of economy reports can be downloaded here.
SURVEY RESULTS ON ON PROVIDING BENCHMARK TEST PROCEDURES FOR PERFORMING AN AVERAGE QUANTITY SYSTEM INSPECTION
Previous Survey Results
Test name 
Total economies surveyed 
Adopted 
Not implemented 
Economies not responded 
1.Define the inspection lot 
19 
14 
1 
4 
2. Determining the appropriate sample size 
19 
13 
2 
4 
3. Determine the appropriate T1 and T2 values 
19 
14 
1 
4 
4. Determine the number of prepackages allowed to exceed the tolerable deficiency 
19 
13 
2 
4 
5. Determine the average tare weight 
19 
14 
2 
4 
6. Determine the individual prepackage error 
19 
15 
4 

7. Determine if the test results meet the individual prepackage requirements 
19 
14 
1 
4 
8. Determine if the test results meet the average prepackage requirement 
19 
14 
1 
4 
Economies responded
Australia, Canada, Cambodia, DPR of Korea, Hong Kong China, Indonesia, Japan, Malaysia, Mongolia, New Zealand, Papua New Guinea, Singapore, Chinese Taipei, Thailand, Vietnam
Economies not responded
China, Philippines, Republic of Korea, United States of America
Australia, Canada, Cambodia, DPR of Korea, Hong Kong China, Indonesia, Japan, Malaysia, Mongolia, New Zealand, Papua New Guinea, Singapore, Chinese Taipei, Thailand, Vietnam
Economies not responded
China, Philippines, Republic of Korea, United States of America