The definition of the product/process/criteria bias that allows the specification of a product or a process, or it may be a criterion value.Pedometers that let it.
Requirements of the product / process / tolerances allowed to enter into the specification of the product or process. Or it could be the basis for any tolerances
Requirements of the product / process / tolerances that allows to put the specification of product or process. Or it may be a threshold value that lets it error