Data quality

Some important things to know:

• Quality does not make sense for itself.
• Quality depends on usages.
• No database at all can pretend to zero-default.
• With more than 1 200 000 products, there are quality concerns: our goal is to lower the impacts of the issues.

Data quality: how to help?

Nutri-Score quality

Some products now have Nutri-Score printed on the front of pack. Some differs from our Nutri-Score calculation. We should take care about that:

• Nutri-Score printed A but calculated E
• Nutri-Score printed A but calculated D
• Nutri-Score printed A but calculated C
• Nutri-Score printed E but calculated A
• Nutri-Score printed E but calculated B
• Nutri-Score printed E but calculated C
• Nutri-Score printed D but calculated A
• Nutri-Score printed D but calculated B
• Nutri-Score printed D but calculated C
• Nutri-Score printed B but calculated E
• Nutri-Score printed B but calculated D
• Nutri-Score printed B but calculated C

There are many reasons why it can differ:

• the label in Open Food Facts does not represent the label printed on the package (easy to solve)
• the label is correct but our calculation doesn't provide the same result:
  • check the category,
  • then check the nutrition facts: the issue is sometimes the lack of "fibers" information or the lack of "Fruits, vegetables, nuts and rapeseed, walnut and olive oils" percentage.
• it can be a software issue (quite rare but possible)

Nutrition values issues

Open Food Facts identifies some issues related to nutrition values. We should take care of it:

• Energy value in kcal greater than in kJ
• Nutrition Salt is higher than 100g per 100g
• Carbohydrate is higher than 100g per 100g
• Fat is higher than 100g per 100g

Non-Food Products

Some people are adding products which are not food: beauty products, books, pet food, etc. These products have to be moved to Open Food Facts side projects. Our AI (artificial intelligence) already identifies many cases. These cases are published in the #bot-image-alerts channel on our slack space.

How to move these products?

• identify a product in the #bot-image-alerts channel
• clic on the link after "edit:"
• if you have the rights to so, you will see "If the barcode is not correct, please correct it here"
  • enter "obf" to move beauty products to Open Beauty Facts
  • enter "opff" to move products to Open Pet Food Facts
  • enter "opf" to move products to Open Product Facts
• save (if "A product already exists with the new code" message appear, move it manually, and delete it)
• in #bot-image-alerts channel, annotate the product with a "checked" icon to tell others that the product has been moved