ANNEX IISupplementary provisions
ANNEX II Methodology for the calculation of the total quantity of WEEE generated in a Member State 1. The total quantity of WEEE generated in a Member State in a given year shall be calculated on the basis of the amount of EEE placed on the market of that Member State in the preceding years, and the corresponding product lifespan estimated on the basis of a discard rate per product as set out in the following equation: Where: W ( n ) = the quantity (tonnes) of WEEE generated in evaluation year n ; POM ( t ) = the quantity (tonnes) of EEE placed on the market in any year t ; t 0 = the first year when an EEE was placed on the market; L ( p ) ( t, n ) = the discard-based lifespan profile for the batch of EEE placed on the market in year t , which reflects its probable discard rate in evaluation year n (discarded equipment in percentage to total sales in year n ) and is calculated by applying a Weibull distribution function defined by a time-varying shape parameter α ( t ) and β ( t ) a scale parameter as follows: When the same lifespan parameters are applied over time, the distribution of EEE lifespan is simplified into the following formula: Where: α (alpha) = the ‘shape parameter’ of the probability distribution β (beta) = the ‘scale parameter’ of the probability distribution 2. Member States shall use the WEEE calculation tool referred to in Article 1 of this Regulation and developed on the basis of the methodology described in point 1 to calculate the total quantity of WEEE generated in their territory in a given year. 3. The WEEE calculation tool shall be pre-populated with data on the quantity of EEE placed on the market for the period 1980-2014 for each Member State, calculated on the basis of the apparent consumption method described in Annex I, and with product lifespan data for the period 1980-2030. The shape and scale parameters of the probability distribution, mentioned in point 1 and determined for each Member State, shall be included in the tool as default values. 4. Member States shall enter into the WEEE calculation tool the annual data on EEE placed on the market from 2015 until the year preceding the year of reference, in order to allow calculation of the weight of WEEE generated in a given year. 5. Member States may update the data on EEE placed on the market or the product lifespan data used in the WEEE calculation tool as set out in point 3. Before proceeding with such updates, Member States shall inform the Commission thereof and shall provide relevant evidence for such updates, including official market surveys, audit results or analysed and substantiated data resulting from consultation of relevant stakeholders.