The testing of packages for compliance with legal marketing requirements is based on the idea of "Maximum Ållowable Variation (MAV) as follows:
1. An Inspector selects random samples from a lot (a shipment) of the product. 2. The amount in each package from the samples is measured and tabulated. 3. The Inspector determines the MAV from a Random Number Table. 4. The Inspector evaluates compliance with the MAV requirement. 5. The Inspector reports deviations from the MAV for enforcement actions. Documentation is in NIST Handbook 133, Chapter 2. "Basic Test Procedure" (also a free download). Numerical examples of Sample Size, Measured Values (some over and some under the "declared value"), and MAV are in the Appendix of Handbook 133. Is this the explanation you want? EAM ---- Original message ---- >Date: Sun, 27 Mar 2011 14:31:33 -0400 >From: "Kilopascal" <[email protected]> >Subject: [USMA:50210] Re: Williams Changes Their Label -- I had an impact >To: <[email protected]>, "U.S. Metric Association" <[email protected]> > > Seeing that the document is 298 pages in the PDF > format, can you direct me to the page where it > states that the contents of a package may be less > than what is declared? > > > http://ts.nist.gov/WeightsAndMeasures/Publications/upload/HB130-2009-PDF-FullDoc.pdf > > I'm not sure what you refer to as "some" and what > their exceptions may be. >[USMA:50210] Re: Williams Changes Their Label -- I had an > impact > > mechtly > Sun, 27 Mar 2011 10:57:47 -0700 > > "Kilopascal" <[email protected]> claimed: > ... > > in the US, the > > declarations represent minimum quantities. > > Everything is going to be a few grams or more over > > stated value. > > Not True! Some packages may be *under* the amount stated on the label. > See NIST Handbook 130 (a free download).
