BS EN 16524-2020 Mechanical products一Methodology for reduction of environmental impacts in product design and development.
220.127.116.11 Scoring of environmental aspects
18.104.22.168.1 Using the algorithm
Complete the environmental questionnaire stated in Annex A, answering all the questions using the choices given in the questionnaire only (the answer don’t know refers to the worst case scenario) and justify your answers where applicable. These answers are used to produce the reference product’s SEA from the algorithm given in Annex B and also to provide input to the company’s assessment on design options and on the overall assessment.
Apply the analysis algorithm given in Annex B based on the answers to the questions (the reference of the question from Annex A is identified on the algorithm).
22.214.171.124.2 Register the scores (1 to 4) obtained for each environmental aspect
NOTE 1 The so obtained SEA gives a description of the most important environmental aspects to consider during the ecodesign of the product, even if these aspects are already partly considered by the company.
EXAMPLE 1 A product is made of renewable RM; however, the score for RM environmental aspect is at level 4 in the SEA. This score of 4 means that RM aspect plays a very important role in the global SEA of the product. compared with the other aspects. If a company has already chosen renewable kM. It shows that this choice was relevant and it will be possible to take advantage of it when ranking the design options (see 6.3), but this choice does not modify the SEA.
EXAMPLE 2 A product has a very low energy consumption compared with another product of the product line; however, the score for the environmental aspect U is at level 4 for both. The score of 4 means that U aspect (related to energy consumption) plays a very important role in the SEA of both products, compared with the other environmental aspects. This score does not allow the conclusion that one of both products is more energy-efficient. For that, the use of indicators is necessary (see 6.4).
NOTE 2 These scores can be given In graph format (see FIgure 6).
6.2.3 Documentation of Step 1
The following documents shall be available as a result of Step 1:
— BOM of the reference product;
— completed questionnaire;
— SEA of the reference product;
They shall be used as inputs for Step 2.
6.3 Step 2: selection/ranking of design options
For each environmental aspect derived from Step 1, relevant design options (DO) on how to improve the product’s environmental performance shall be selected and ranked, taking into account the other technical, economic and strategic constraints relating to the design project.
126.96.36.199 Using Annex C, select, for each environmental aspect, the design options (DO) that are most relevant to the reference product’s SEA and register these options as specified in Table 2.
The DO specified in Annex C are general design options for the reference product. The company should reconsider these general options and adapt them (where necessary) to be appropriate for the product under study.
188.8.131.52 Rank the design options (DO) by weighting them using the environmental, technical, economic and strategic scores, as stated in Table 2.
NOTE 1 Technical and economic scores allow priontising the design solutions which confer to the product good environmental performances. For example, when a product characteristic is already very good, possible action to improve it is low. This does not contradict the fact that this environmental aspect is relevant and is not to be downgraded; consequently, the corresponding DO is relevant from a technical perspective.
NOTE 2 Consistency between company strategy and environmental DOs is a key factor of the methodology. It makes it necessary to engage and involve the top management of the company to ensure appropriate support when the essential design choices are made.
184.108.40.206 Decide which DOs shall be retained. For each EA with a significant environmental score, retain
those DOs which have a higher final score.
NOTE A number of three DOs is considered to be reasonable.BS EN 16524 pdf download.