Quelles sont les meilleures pratiques pour intégrer l’analyse du cycle de vie dans la conception des produits ?

1) Designing a product with the end of the cycle in mind from the beginning. Use materials that are easily deconstructed for repurposing or recycling, do not use hard-to-recycle materials with many intertwined material types. Know what materials already have secondary markets. 2) Design with your area in mind, thinking locally available to the manufacturing facility. Any offcuts from another nearby plant? 3) Design for manufacturing so that you can know the inputs and facility. Contract manufacturing can be a black hole. If possible design for manufacturing near your buyers.

The design of a product is one thing. But will that product really be of service to people? How well will it serve human beings? Is it a product that will add serious value to their lives? From those initial questions, then we can move on to assessing the overall life cycle of that product. And hopefully its design and manufacturing will harm the planet as little as possible.

In the initial stage of any Life Cycle Assessment (LCA), defining the study's goal and scope is crucial. This involves specifying the functional unit, system boundaries, impact categories, and data sources. The functional unit sets the performance and function of the product or service. System boundaries determine which processes are included or excluded. Impact categories highlight relevant environmental issues (e.g., climate change, water use). Data sources, such as databases or literature, provide information on process inputs and outputs within the defined system boundaries.

Integrating life cycle assessment (LCA) into product design involves early initiation for impactful decisions. Thorough data collection on raw materials, manufacturing, energy use, transportation, product usage, and end-of-life scenarios is key. Evaluate alternatives rigorously, utilizing standardized methodologies (e.g., ISO 14040/44) and dedicated software tools. Engage stakeholders for diverse perspectives, and conduct iterative LCAs to refine analyses. Clearly define goals and scope, fostering interdisciplinary collaboration among departments. Educate design teams on life cycle thinking principles for informed decision-making. This comprehensive approach ensures sustainable product design with reduced environmental impact.

Plan - Identify needs and design the product. DO - Execute the planned process to get the product. Check - Analyse the product quality in comparison with the expected quality. Act - Implement the effective solutions.

The second step in any Life Cycle Assessment (LCA) involves selecting the appropriate method based on the study's goal and scope. LCA methods include attributional, consequential, or comparative approaches. Attributional LCA examines environmental impacts without considering changes or alternatives. Consequential LCA assesses impacts resulting from decisions or changes, considering effects on other systems or markets. Comparative LCA compares the environmental impacts of products or services with the same functional unit, utilizing either attributional or consequential LCA.

In the third step of any Life Cycle Assessment (LCA), the focus is on collecting and validating data for processes within the defined system boundaries. This includes obtaining information on materials, energy, emissions, and waste from primary (directly from providers or manufacturers) or secondary sources (existing databases or literature). The data must be consistent, accurate, complete, and representative of the product or service, and it should undergo validation to identify errors, gaps, outliers, or uncertainties.

The fourth step of any Life Cycle Assessment (LCA) centers on analyzing and interpreting the results obtained from data collection and calculation. This involves applying impact assessment methods, such as characterization, normalization, weighting, or grouping, to convert process inputs and outputs into environmental impacts. The choice of impact assessment methods depends on the study's goal, scope, data availability, and quality. Results should be interpreted considering assumptions, limitations, uncertainties, and trade-offs of the LCA. Additionally, comparisons with other products, benchmarks, or targets help identify hotspots, improvement opportunities, or best practices for the assessed product or service.

In the fifth and final step of any Life Cycle Assessment (LCA), the focus shifts to communicating and applying the findings. This involves preparing an LCA report adhering to standards like ISO 14040 and ISO 14044. The report should cover goal and scope, data collection and validation, analysis and interpretation, and conclusions with recommendations. It must be transparent, clear, and tailored to the intended audience (e.g., product designers, managers, customers, or stakeholders). The LCA findings should inform and support the product design process, aiding in material selection, process optimization, performance improvement, or value enhancement for the product or service.

Data Accuracy - Ensure data accuracy in LCA inputs. Use up-to-date and accurate data to enhance the reliability of environmental assessments, enabling more precise decision-making. Stakeholder Involvement - Involve stakeholders in the process. Consider the perspectives of consumers, suppliers, and regulatory bodies to align the product design with broader societal and market expectations. Continuous Improvement - Embrace a culture of continuous improvement. Regularly revisit and update LCAs as new data becomes available, allowing for ongoing refinement of design practices and sustainability goals.