The purpose of this standard is to describe a procedure for the control of the film processing systems by users by processing calibrated pre-exposed strips. The strips are exposed to X-rays and are accompanied by a certificate from the film strip manufacurer. The user processes the pre-exposed strips in his system and records the results. In this standard, clause 4 shows the responsability of the film strip manufacturer. The user is responsible for clauses 5 to 8 which show compliance with the chosen system classification.