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Über dieses Buch

In an environmental life cycle assessment of products (LCA), an unambiguous, scientifically based, ‘objective’ attribution of material and energy flows to a product is pure fiction. This is due to the fundamental epistemological conditions of LCA as a modelling process under the complexity of our socio-economic system. Instead, various mental models and values guide this attribution. This leads to a functional model in a specific decision situation.

This book shows for the first time how mental models and values influence this attribution in the life cycle inventory step of LCA. One of the key findings is that the different management rules for a sustainable use of materials must be taken into account for the attribution of material and energy flows to a product. Otherwise, improvement options recommended by an LCA might turn out to even worsen the environmental situation if reassessed from a meta-perspective.

As a consequence of this book, the claim of unambiguitiy (‘objectivity’) of the life cycle inventory must be abandoned. A group-model building process for LCA is developed that allows one to grasp the decision makers' mental models and values in the inventory analysis on a case- and situation-specific basis. Only by this, LCA results will become relevant in a decision-making process.

Two case studies on the modelling of recycling and other end-of-life options of aluminium windows and beech wood railway sleepers in LCA complement the methodological part.

This book is a ‘must have’ for researchers, consultants and practitioners in the fields of decision-oriented life cycle assessment as well as product-related environmental management, modelling and decision-making.

Inhaltsverzeichnis

Frontmatter

Introduction

1. Introduction

Without Abstract

Requirements of Product Systems and Their Life Cycle Inventories in Product-Related Decision-Making

2. LCA as Method and its Modelling Characteristics

Without Abstract

3. Requirements of LCIs in Product Design-Related Decision-Making

Without Abstract

Mental Models and Value Choices in the Life Cycle Inventory Analysis

4. Introduction

5. Analysis of ISO 14041 for Mental Models and Values

Without Abstract

6. Allocation Procedures for Open-Loop Recycling

Without Abstract

7. The Decision-Maker’s Mental Models and Values in Inventory Analysis

Without Abstract

Case Study I: Development of the Value-Corrected Substitution for Aluminium Windows

8. Introduction

9. Material and Market Characteristics of Aluminium

Without Abstract

10. Development of the Value-Corrected Substitution for Aluminium Windows

Without Abstract

11. Selected Allocation Procedures for Comparison

Without Abstract

12. Application in an LCA of Aluminium Windows

Without Abstract

13. Methodological Conclusions

Without Abstract

Case Study II: Modelling End-of-Life Options for Beech Wood Railway Sleepers

14. Introduction

15. Material and Market Characteristics of Wood

Without Abstract

16. Sustainable Wood Flow Management

Without Abstract

17. Wood Processing Chain and Attribution in LCA

Without Abstract

18. Modelling End-of-Life Options of Beech Wood Railway Sleepers

Without Abstract

19. Conclusions

Without Abstract

Conclusions and Outlook

20. Review of the Theses

Without Abstract

21. Consequences for LCA as a Decision Support Tool

22. Consequences for a Revision of ISO/EN 14041

Without Abstract

23. Toward a Group-Model Building Process in LCA

Without Abstract

24. Future Research Needs

Backmatter

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