This Technical Report deals with the determination of repeatability and reproducibility of test methods used for assessing the characteristics of household electrical appliances. It does not cover the development of measurement methods but deals with gathering and evaluating the information needed by a manufacturer so that values can be stated after an appliance has been subjected to an agreed test. It also does not deal with: – the production variability of the appliance; – how closely the measurement method reflects the normal use of the appliance. NOTE 1 – Although this technical report does not cover the development of test methods, it may be taken into consideration for this purpose. NOTE 2 – For the purpose of this technical report production variability includes the variation of the individual appliances of the same type and model manufactured on the same production line.