aleene
commented
1 year ago Very good deduction. You can always use the Folksonomy to indicate that there is an error mde by the producer (key producer_issue). Normally the error would be inconsistent nutriscore, as package and calculatio mismatch, but after your deduction it is more fiber missing.
The next question is what OFF should do. In general when no fiber has been specified it means that there is no fiber, so the assumption of 0 is good. In the case of this category OFF could not do a calculation (as data is missing) or do a upper limit calculation as it does now.
In both cases it would be nice if we could add a warning to infirm the user that there is an issue. But how is this warning to be triggered? In the narrow case of missing fiber we should indicate somewhere that this product should have a fiber value. Most logical is to add this to the category taxonomy, so that any product that has been assigned can be triggered.
But what to add in the taxonomy? A label, like fiber rich, or a mean value, so that we can do a calculation, and present an implied nutriscore?
And why stop here, now that we are at it? Maybe we can check whether the values fall between a range, and trigger a warning when a product falls outside this range.
And in the broader case: why only fiber? We could do this for any nutritional value.
In short: you opened a can of worms here, very interesting, but a large effort. Maybe we could define a student project for this.
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benbenben2
Describe the bug
Rye whole-grain bread, such as https://world.openfoodfacts.org/product/4007933457419/pumpernickel-go-bio have a high content of fiber. But if you look at the product page, the computed Nutri-Score is only C instead of A as printed on the package. After some testing and experiments using the Nutri-Score calculator on https://nutrirechner.xyz/en/ it turns out that the OFF server seems to assume 0 g of fiber, even if the field for fiber is filled with “-” as documented if the value is not given on the package instead of leaving it blank.
But if you look on similar products in this special whole-grain rye bread category and on https://world.openfoodfacts.org/product/4007933252045/pumpernickel-delba especially, which is the same product, produced in the same factory (Delba Backbetrieb GmbH) but marketed under a different (discounter) brand, it contains at least 7.9 g of fiber/100 g.
If you then fill in 7.9 g of fiber in the Nutri-Score calculator, it turns out that the Nutri-Score on the package is right.
To Reproduce
See above.
Expected behavior
The Openfoodfacts server computes the right Nutri-Score of A for the example above instead of C.
Screenshots
No response
Additional context
No response
Type of device
Browser
Browser version
No response
Number of products impacted
Should affect at least all whole-grain products, which are underrated because of this bug, even as they are healthy.
Time per product
No response