January Shift 2020
Sustainability News and Views Newsletter
We're super excited about the 50 year anniversary of LCA and
our 20 years of doing business consulting in LCA!
IJLCA Publication: "Sensitivity to Weighting in Life Cycle Impact Assessment"
Weights in LCA are used to reflect values and priorities in a decision and can help a selection process of comparative LCAs where there are tradeoffs. Weights, and specifically, weight factors can be used in LCA to generate single scores and facilitate a decision. While there are several studies delving into the evaluation and extraction of such weight values, few study the role of weights in the single score.
This study evaluates the role of weight factors in two forms of aggregation: conventional single score consisting of a linear weighted sum, and outranking, a non-linear aggregation method based on mutual differences between alternatives and inclusive of uncertainty. The study tests CML-IA and ReCiPe.
The goal is to identify how weight values affect (or not) the final aggregated score and this way evaluate the sensitivity of aggregation methods. This study finds that conventional aggregation methods are dominated by a few indicators and hence has a lower sensitivity to weights. Therefore it is less receptive to values. Outranking on the other hand, is more receptive to weights where priorities in different criteria can play a role in the final result.
The study also finds that outranking generates a result consistent between impact assessment methods: CML and ReCiPe. Results of conventional aggregation using either regional or global normalization references, are inconsistent between impact assessment methods and that both scales of normalization references are also dependent on a few impact categories.
This study illustrates how we need to take into account the mathematical relationship between "facts" (what we calculate with LCA) and values (what we reflect with weights) in an aggregation method and how that affects the overall score.
This finding is important for decision making as it is key that values and priorities can be reflected in the interpretation of results.
Peru LCA - Video Contest Winners of CILCA 2019
A social-media voting process awarded the top prize to “Portal web Peru LCA,” a one-minute informational video about the Peru LCA project website, which serves as the national Life Cycle Inventory database of Peru. All organizations that submitted a video to our contest received a monetary token of appreciation for participating.
How To Get Better At Life Cycle Assessments (Seriously)
Like any research-oriented process, LCAs require care and attention to uncover previously hidden data from sources inside and outside your company. Even if you've done a life cycle assessment before, there's always room for improvement. These seven factors—compiled after almost two decades of conducting this type of analysis for hundreds of organizations—can help make your next LCA as efficient, effective and, above all, as easy as possible.
1. Save time and effort by identifying the questions you really need to answer in your life cycle assessment.
When you undertake a life cycle assessment, you’ll analyze one or more supply chains—and each can be incredibly complex. Narrowing your scope...
Thursday, February 13, 2020 - 1:00pm EST
In order to fully address climate change, and create an environment that is healthy and sustainable, we have to change the stories we tell ourselves about the earth. This webinar will explore our current views of the earth, how liberal and conservatives think, and to leverage our differences to address climate change. This webinar will show how the climate crisis may be the best opportunity we’ve had in years to move towards a more compassionate and healthy way of life.
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Sustainability Classes for 2020
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FREE Impact Assessment Course, available in (PDF)
February 5, 2020 Free 1 hr. S-ROI 11:00 am to 12:00 pm EST (16:00-17:00 UTC)
March 3, 2020 Three-Hour Survey Class with Hands-On 3Pillars Section 3:00 pm to 6:00 pm EST (20:00-23:00 UTC)
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