A product in the sense of something that a user can use for a specific purpose requires a certain quality. Therefore, its accuracy needs to be judged with an accuracy assessment measure that the user understands and where he can interpret the meaning in relation to the purpose. The product has to be validated, i.e. it has to be known whether the product qualifies for use in a certain context. And in addition, the product needs to be available in time that the users can base their decision on it.