we were trying to sale our products to Canada. I need to ensure if our products net weight is compliance with SFCR and have a procedure in place for our process. I have been trying to get my head around the weights and measures.
Tolerances for net quantities declared in metric units of mass for catch weight products
more than 60 gr to not more than 600 gr - Tolerance is 6 grams
1. The declared quantity on a package should accurately reflect the quantity being supplied, so the average net contents of the packages in a lot may not be less than the declared quantity
2. The control over production should be such that the individual packages are within allowable tolerances. No more than 2.5% of the lot may have a negative error larger than the tolerance.
3. The number of packages which may have excessive negative errors is limited. Not more than one package may contain less than twice the permitted tolerance.
As an example I am thinking of a 500 g pack (brownie- bakery products) in a lot of 20000 packs. It is required the tolerance should be 6 gr. The tolerable negative error would be 2.5% of nominal weight. How can I calculate the average net quantity in a lot?