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Life Cycle Impact Assessment. Admin Issues. HW 2 Answers (done grading?) Setting group presentations 1 or 2 classes can we run late? How much time? Or do on Friday? Spreadsheets for EIO-LCA Impact Assessment Exercise/Lecture. Impact Assessment (LCIA). Mandatory Elements:

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admin issues
Admin Issues
  • HW 2 Answers (done grading?)
  • Setting group presentations
    • 1 or 2 classes
    • can we run late?
    • How much time?
    • Or do on Friday?
  • Spreadsheets for EIO-LCA
  • Impact Assessment Exercise/Lecture
impact assessment lcia
Impact Assessment (LCIA)
  • Mandatory Elements:
    • Selection (impact categories, their indicators, and characterization models)
    • Classification (assigning LCI results to categories)
    • Characterization (calculation of category results)
  • Optional Elements:
    • Normalization (comparing to reference info)
    • Grouping (sorting/ranking impact categories)
    • Weighting (with numerical factors/value choices)
    • Data Quality Analysis (uncertainty/sensitivity)
midpoints vs endpoints
Midpoints vs. Endpoints
  • Typical LCI result is ‘an emission, waste generation, etc.’ - This is a midpoint
  • Breathing emissions, etc. potentially leads to health effects - these are endpoints or impacts
  • Now you can see why many studies stop at LCI stage!
lcia model example
LCIA ‘Model’ Example

Source: ISO 14042 Doc

  • Should have a comprehensive set of impact categories/indicators
  • Your own “values” should not bias your model
limitations
Limitations
  • Scientific method combined with values
  • Lack of comprehensive focus/boundary
  • Category indicators not equally important or precise
  • Lack of complete data
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