Quality Index (QI) is an accurate method for measuring the freshness of chilled seafood.
QI is based on scoring schemes specifically developed to provide a direct correlation between a particular score and the storage time of product at 0oC, this is known as ice-days. Therefore QI scores indicate a time-temperature history of the product expressed in ice-day equivalents. The seafood’s attributes are scored using demerit points. The scores are then summed to provide a total, which is the Quality Index itself.