Difference between revisions of "Data quality"

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** 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.
 
** 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)
 
* it can be a software issue (quite rare but possible)
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=== Nutrition values issues ===
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Open Food Facts identifies some issues related to nutrition values. We should take care of it:
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* [https://world.openfoodfacts.org/data-quality/nutrition-value-over-105-salt Nutrition Salt is higher than 100g per 100g]
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* [https://world.openfoodfacts.org/data-quality/nutrition-value-over-105-carbohydrates Carbohydrate is higher than 100g per 100g]
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* [https://world.openfoodfacts.org/data-quality/nutrition-value-over-105-fat Fat is higher than 100g per 100g]

Revision as of 15:15, 31 March 2020

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:

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: