A survey of unresolved problems in life cycle assessment

Part 2: impact assessment and interpretation
REVIEW ARTICLE

Abstract

Background, aims, and scope

Life cycle assessment (LCA) stands as the pre-eminent tool for estimating environmental effects caused by products and processes from ‘cradle to grave’ or ‘cradle to cradle.’ It exists in multiple forms, claims a growing list of practitioners and remains a focus of continuing research. Despite its popularity and codification by organizations such as the International Organization for Standardization and the Society of Environmental Toxicology and Chemistry, life cycle assessment is a tool in need of improvement. Multiple authors have written about its individual problems, but a unified treatment of the subject is lacking. The following literature survey gathers and explains issues, problems and problematic decisions currently limiting LCA’s impact assessment and interpretation phases.

Main features

The review identifies 15 major problem areas and organizes them by the LCA phases in which each appears. This part of the review focuses on the latter eight problems. It is meant as a concise summary for practitioners interested in methodological limitations which might degrade the accuracy of their assessments. For new researchers, it provides an overview of pertinent problem areas toward which they might wish to direct their research efforts. Having identified and discussed LCA’s major problems, closing sections highlight the most critical problems and briefly propose research agendas meant to improve them.

Results and discussion

Multiple problems occur in each of LCA’s four phases and reduce the accuracy of this tool. Considering problem severity and the adequacy of current solutions, six of the 15 discussed problems are of paramount importance. In LCA’s latter two phases, spatial variation and local environmental uniqueness are critical problems requiring particular attention. Data availability and quality are identified as critical problems affecting all four phases.

Conclusions and recommendations

Observing that significant efforts by multiple researchers have not resulted in a single, agreed upon approach for the first three critical problems, development of LCA archetypes for functional unit definition, boundary selection and allocation is proposed. Further development of spatially explicit, dynamic modeling is recommended to ameliorate the problems of spatial variation and local environmental uniqueness. Finally, this paper echoes calls for peer-reviewed, standardized LCA inventory and impact databases, and it suggests the development of model bases. Both of these efforts would help alleviate persistent problems with data availability and quality.

Keywords

Environmental assessment LCA LCA methodology LCIA Life cycle impact assessment Life cycle interpretation 

References

  1. Ayres RU (1995) Life cycle analysis: a critique. Resour, Conserv Recycl 14:199–223CrossRefGoogle Scholar
  2. Bare J, Pennington DW, Udo de Haes HA (1999) Life cycle impact assessment sophistication. Int J Life Cycle Assess 4:299–306Google Scholar
  3. Bare JC, Norris GA, Pennington DW, McKone T (2002) TRACI the tool for the reduction and assessment of chemical and other environmental impacts. J Ind Ecol 6:49–78CrossRefGoogle Scholar
  4. Ben-Haim Y (2006) Info-gap decision theory: decisions under severe uncertainty. Series on decision and risk. Academic, San Diego, p 330Google Scholar
  5. Benetto E, Dujet C, Rousseaux P (2005) Possibility theory: a new approach to uncertainty analysis. Int J Life Cycle Assess 11:1–3Google Scholar
  6. Björklund AE (2002) Survey of approaches to improve reliability in LCA. Int J Life Cycle Assess 7:64–72Google Scholar
  7. Bockstael NE, Freeman AM, Kopp RJ, Portney PR, Smith VK (2000) On measuring economic values for nature. Environ Sci Technol 34:1384–1389CrossRefGoogle Scholar
  8. Brentrup F, Kusters J, Lammel J, Kuhlmann H (2002) Life cycle impact assessment of land use based on the Hemeroby concept. Int J Life Cycle Assess 7:339–348Google Scholar
  9. Canals LM, Bauer C, Depestele J, Dubreuil A, Knuchel RF, Gaillard G, Michelsen O, Mueller-Wenk R, Rydgren B (2006) Key elements in a framework for land use impact assessment within LCA. Int J Life Cycle Assess 11:1–11Google Scholar
  10. Ciroth A, Fleischer G, Steinbach J (2004) Uncertainty calculation in life cycle assessments: a combined model of simulation and approximation. Int J Life Cycle Assess 9:216–226Google Scholar
  11. Cowell SJ, Fairman R, Lofstedt RE (2002) Use of risk assessment and life cycle assessment in decision making: a common policy research agenda. Risk Anal 22:879–894CrossRefGoogle Scholar
  12. Dekay ML, Small MJ, Fischbeck PS, Farrow RS, Cullen A, Kadane JB, Lave LB, Morgan MG, Takemura K (2002) Risk-based decision analysis in support of precautionary policies. J Risk Res 5:391–417Google Scholar
  13. Dreyer LC, Niemann AL, Hauschild MZ (2003) Comparison of three different LCIA methods: EDIP97, CML2001 and eco-indicator 99: does it matter which you choose. Int J Life Cycle Assess 8:191–200Google Scholar
  14. Duncan SJ, Bras B, Paredis CJJ (2008) An approach to robust decision making under severe uncertainty in life cycle design. IJSDes 1(1):45–59CrossRefGoogle Scholar
  15. Ehrenfeld J (1997) The importance of LCAs—warts and all. J Ind Ecol 1:41–49CrossRefGoogle Scholar
  16. Farrow RS, Goldburg CB, Small MJ (2000) Economic valuation of the environment: a special issue. Environ Sci Technol 34:1381–1383CrossRefGoogle Scholar
  17. Field F, Kirchain R, Clark J (2001) Life-cycle assessment and temporal distributions of emissions. J Ind Ecol 4:71–91CrossRefGoogle Scholar
  18. Finnveden G (2000) On the limitations of life cycle assessment and environmental systems analysis tools in general. Int J Life Cycle Assess 5:229–238Google Scholar
  19. Finnveden G (2005) The resource debate needs to continue. Int J Life Cycle Assess 10:372Google Scholar
  20. Finnveden G, Nilsson M (2005) Site-dependent life-cycle impact assessment in Sweden. Int J Life Cycle Assess 10:235–239Google Scholar
  21. Finnveden G, Hofstetter P, Bare J, Basson L, Ciroth A, Mettier T, Seppälä J, Johansson J, Norris G, Volkwein S (2002) Normalisation, grouping, and weighting in life cycle impact assessment. In: Udo de Haes HA et al (ed) Life cycle impact assessment: striving towards best practice. Society of Environmental Toxicology and Chemistry (SETAC), PensacolaGoogle Scholar
  22. Foley JA, DeFries R, Asner G, Barford C, Bonan G, Carpenter SR, Chapin FS, Coe MT, Daily GC, Gibbs HK, Helkowski JH, Holloway T, Howard EA, Kucharik CJ, Monfreda C, Patz JA, Prentice IC, Ramankutty N, Snyder PK (2005) Global consequences of land use. Science 309:570–574CrossRefGoogle Scholar
  23. Geisler G, Hellweg S, Hungerbühler K (2004) Uncertainty analysis in life cycle assessment (LCA). Case study on plant-protection products and implications for decision making. Int J Life Cycle Assess 10:184–192CrossRefGoogle Scholar
  24. Gonzalez B, Adenso-Diaz B, Gonzalez-Torre PL (2002) A fuzzy logic approach for the impact assessment in LCA. Resour, Conserv Recycl 37:61–79CrossRefGoogle Scholar
  25. Graedel TE (1998) Streamlined life-cycle assessment. Prentice Hall, Upper Saddle River, NJ, p 310Google Scholar
  26. Güereca LP, Agell N, Gasso S, Baldasano JM (2007) Fuzzy approach to life cycle impact assessment: an application for biowaste management systems. Int J Life Cycle Assess 12(7):488–496Google Scholar
  27. Guinee J, Heijungs R (1993) A proposal for the classification of toxic substances within the framework of life cycle assessment of products. Chemosphere 26:1925–1944CrossRefGoogle Scholar
  28. Hammitt JK (2002) QALYs versus WTP. Risk Anal 22:985–1001CrossRefGoogle Scholar
  29. Hauschild M, Wenzel H (2000) Life cycle assessment–environmental assessment of products. In: Jørgensen SE (ed) A systems approach to the environmental analysis of pollution minimization. Lewis, Boca Raton, pp 155–189Google Scholar
  30. Heijungs R, Guinée JB, Kleijn R, Rovers V (2007) Bias in normalization: causes, consequences, detection and remedies. Int J Life Cycle Assess 12(4):211–216CrossRefGoogle Scholar
  31. Hellweg S (2001) Time and site-dependent life cycle assessment of thermal waste treatment processes. Int J Life Cycle Assess 6:46Google Scholar
  32. Hellweg S, Hofstetter P, Hungerbühler K (2003) Discounting and the environment—should current impacts be weighted differently than impacts harming future generations. Int J Life Cycle Assess 8:8–18Google Scholar
  33. Hellweg S, Demou E, Scheringer M, McKone TE, Hungerbuhler K (2005) Confronting workplace exposure to chemicals with LCA: examples of trichloroethylene and perchloroethylene in metal degreasing and dry cleaning. Environ Sci Technol 39:7741–7748CrossRefGoogle Scholar
  34. Hertwich EG, Hammitt JK (2001) A decision-analytic framework for impact assessment. Part 1: LCA and decision analysis. Int J Life Cycle Assess 6:5–12CrossRefGoogle Scholar
  35. Hertwich EG, Hammitt JK, Pease WS (2000) A theoretical foundation for life-cycle assessment. J Ind Ecol 4:13–28CrossRefGoogle Scholar
  36. Hettelingh J-P, Posch M, Potting J (2005) Country-dependent characterisation factors for acidification in Europe: a critical evaluation. Int J Life Cycle Assess 10:177–183CrossRefGoogle Scholar
  37. Heuvelmans G, Muys B, Feyen J (2005) Extending the life cycle methodology to cover impacts of land use systems on the water balance. Int J Life Cycle Assess 10:113–119CrossRefGoogle Scholar
  38. Hofstetter P, Bare JC, Hammitt JK, Murphy PA, Rice GE (2002) Tools for comparative analysis of alternatives: competing or complementary perspectives. Risk Anal 22:833–851CrossRefGoogle Scholar
  39. Huijbreghts MA, Seppala J (2000) Towards region-specific, European fate factors for airborne nitrogen compounds causing aquatic eutrophication. Int J Life Cycle Assess 5:65–67Google Scholar
  40. Huijbreghts MA, Schopp W, Verkuijlen E, Heijungs R, Reijnders L (2001) Spatially explicit characterization of acidifying and eutrophying air pollution in life-cycle assessment. J Ind Ecol 4:75–91CrossRefGoogle Scholar
  41. Huijbregts MAJ (1998) Part I: a general framework for the analysis of uncertainty and variability in life cycle assessment. Int J Life Cycle Assess 3:273–280CrossRefGoogle Scholar
  42. ISO (1998) ISO 14041: environmental management–life cycle assessment–goal and scope definition and inventory analysis. ISO 14041:1998(E), International Standards OrganizationGoogle Scholar
  43. ISO (2000a) ISO 14042: environmental management–life cycle assessment–life cycle impact assessment. ISO 14042:2000(E), International Standards OrganizationGoogle Scholar
  44. ISO (2000b) ISO 14043: environmental management–life cycle assessment–life cycle interpretation. ISO 14043:2000(E), International Standards OrganizationGoogle Scholar
  45. ISO (2006a) ISO 14040: environmental management–life cycle assessment–principles and framework. ISO 14040:2006(E), International Standards OrganizationGoogle Scholar
  46. ISO (2006b) ISO 14044: environmental management–life cycle assessment–requirements and guidelines. ISO 14044:2006(E), International Standards OrganizationGoogle Scholar
  47. Jensen AA, Hoffman L, Møller BT, Schmidt A, Christiansen K, Elkington J, van Dijk F (1997) Life cycle assessment (LCA). A guide to approaches, experiences, and information sources. European Environmental Agency, CopenhagenGoogle Scholar
  48. Jolliet O, Mueller-Wenk R, Bare J, Brent A, Goedkoop M, Heijungs R, Itsubo N, Peña C, Pennington DW, Potting J, Rebitzer G, Stewart M, Udo de Haes HA, Weidema B (2004) The LCIA midpoint-damage framework of the UNEP/SETAC life cycle initiative. Int J Life Cycle Assess 9:394–404CrossRefGoogle Scholar
  49. Joslyn C, Booker J (2004) In: Nikolaidis E, Ghiocel D, Singhal S (eds) Generalized information theory for engineering modeling and simulation. Engineering design reliability handbook. CRC, Boca Raton, Florida, pp 9:1–9:40Google Scholar
  50. Kahneman D, Knetsch JL (1992) Valuing public goods: the purchase of moral satisfaction. J Environ Econ Manage 22:57–70CrossRefGoogle Scholar
  51. Keeney RL, Raiffa H (1976) Decisions with multiple objectives: preferences and value tradeoffs, vol. xix. Wiley, New York, p 569Google Scholar
  52. Kerwitt W, TrukenMueller A, Bachmann TM, Heck T (2001) Country-specific damage factors for air pollution: a step toward site-dependent life cycle impact assessment. Int J Life Cycle Assess 6:199–210Google Scholar
  53. Lee JJ, O’Callaghan P, Allen D (1995) Critical review of life cycle analysis and assessment techniques and their application to commercial activities. Resour, Conserv Recycl 13:37–56CrossRefGoogle Scholar
  54. Lent T (2003) Toxic data bias and the challenges of using LCA in the design community, greenBuild 2003, Pittsburg, PAGoogle Scholar
  55. Lindeijer E (2000) Review of land use impact methodologies. J Clean Prod 8:273–281CrossRefGoogle Scholar
  56. Lloyd SM, Ries R (2007) Characterizing, propagating, and analyzing uncertainty in life-cycle assessment: a survey of quantitative approaches. J Ind Ecol 11:161–179CrossRefGoogle Scholar
  57. Matthews HS, Lave LB (2000) Applications of environmental valuation for determining externality costs. Environ Sci Technol 34:1390–1395CrossRefGoogle Scholar
  58. Matthews HS, Lave L, MacLean H (2002) Life cycle impact assessment: a challenge for risk analysts. Risk Anal 22:853–860CrossRefGoogle Scholar
  59. Maurice B, Frischknecht R, Coelho-Schwirtza V, Hungerbühler K (2000) Uncertainty analysis in life cycle inventory. Application to the production of electricity with French coal power plants. J Clean Prod 8:95–108CrossRefGoogle Scholar
  60. McCleese D, LaPuma P (2002) Using Monte Carlo simulation in life cycle assessment for electric and internal combustion vehicles. Int J Life Cycle Assess 7:230–236Google Scholar
  61. Mettier TM, Hofstetter P (2004) Survey insights into weighting environmental damages: influence of context and group. J Ind Ecol 8:189–209CrossRefGoogle Scholar
  62. Mettier T, Scholz RW, Tietje O (2006) Measuring preferences on environmental damages in LCIA. Part 1: cognitive limits in panel surveys. Int J Life Cycle Assess 11:394–402CrossRefGoogle Scholar
  63. Morgan MG, Henrion M, Small MJ (1990) Uncertainty: a guide to dealing with uncertainty in quantitative risk and policy analysis. Cambridge University Press, New York, p 332Google Scholar
  64. Moriguchi Y, Terazono A (2000) A simplified model for spatially differentiated impact assessment of air emissions. Int J Life Cycle Assess 5:281–286Google Scholar
  65. Mueller-Wenk R (2004) A method to include in LCA road traffic noise and its health effects. Int J Life Cycle Assess 9:76–85Google Scholar
  66. Nigge K-M (2001a) Generic spatial classes for human health impacts, Part I: methodology. Int J Life Cycle Assess 6:1–8Google Scholar
  67. Nigge K-M (2001b) Generic spatial classes for human health impacts, Part II: application in a life cycle assessment of natural gas vehicles. Int J Life Cycle Assess 6:334–338Google Scholar
  68. Owens JW (1997a) Life-cycle assessment—constraints on moving from inventory to impact assessment. J Ind Ecol 1:37–49CrossRefGoogle Scholar
  69. Owens JW (1997b) Life-cycle assessment in relation to risk assessment: an evolving perspective. Risk Anal 17:359–365CrossRefGoogle Scholar
  70. Pant R, Hoof GV, Schowanek D, Feijtel TCJ, de Koning A, Hauschild M, Pennington DW, Olsen SI, Rosenbaum R (2004) Comparison between three different LCIA methods for aquatic ecotoxicity and a product environmental risk assessment—insights from a detergent case study within OMNIITOX. Int J Life Cycle Assess 9:295–306Google Scholar
  71. Pennington DW (2001) Current issues in the characterization of toxicological impacts. Int J Life Cycle Assess 6:89–95Google Scholar
  72. Pohl C, Ros M, Waldeck B, Dinkel F (1996) Imprecision and uncertainty in LCA. In: Schaltegger S (ed) Life cycle assessment (LCA)–quo vadis. Birkhäuser, BerlinGoogle Scholar
  73. Potting J, Hauschild MZ (2006) Spatial differentiation in life cycle impact assessment: a decade of method development to increase the environmental realism of LCIA. Int J Life Cycle Assess 11:11–13CrossRefGoogle Scholar
  74. Potting J, Schopp W, Blok K, Hauschild M (1998) Site-dependent life-cycle impact assessment of acidification. J Ind Ecol 2:63–87CrossRefGoogle Scholar
  75. Reap JJ, Newcomb PJ, Carmichael C, Bras B (2003) Improving life cycle assessment by including spatial, dynamic and place-based modeling, design engineering technical conferences and computers and information in engineering conference. ASME, Chicago, Illinois USAGoogle Scholar
  76. Reap JJ, Bras B, Realff MJ, Carmichael C (2004) Using ecosystem landscape models to investigate industrial environmental impacts, design engineering technical conferences and computers and information in engineering conference. ASME, Salt Lake City, Utah USAGoogle Scholar
  77. Reap J, Roman F, Duncan S, Bras B (2008) A survey of unresolved problems in life cycle assessment. Part 1: goal & scope and inventory analysis. Int J Life Cycle Assess 13(4), DOI 10.1007/s11367-008-0008-x
  78. Regli WC, Gaines DM (1997) A repository for design, process planning and assembly. Comput Aided Des 29:895–905CrossRefGoogle Scholar
  79. Ross S, Evans D (2002) Excluding site-specific data from the LCA inventory: how this affects life cycle impact assessment. Int J Life Cycle Assess 7:141–150Google Scholar
  80. Sadiq R, Khan FI (2006) An integrated approach for risk-based life cycle assessment and multi-criteria decision-making: selection, design and evaluation of cleaner and greener processes. Bus Process Manag J 12:770–792CrossRefGoogle Scholar
  81. Thomas V, Graedel TE (2003) Research issues in sustainable consumption: toward an analytical framework for materials and the environment. Environ Sci Technol 37:5383–5388CrossRefGoogle Scholar
  82. Thomas V, Theis T, Lifset R, Grasso D, Kim B, Koshland C, Pfahl R (2003) Industrial ecology: policy potential and research needs. Environ Eng Sci 20:1–9CrossRefGoogle Scholar
  83. Tolle DA (1996) Regional scaling and normalization in LCIA: development and application of methods. Int J Life Cycle Assess 2:197–208Google Scholar
  84. Turner RK, Pearce D, Bateman I (1993) Environmental economics: an elementary introduction. Johns Hopkins University Press, BaltimoreGoogle Scholar
  85. Turner MG, Gardner RH, O’Neill RV (2001) Landscape ecology in theory and practice: pattern and process. Springer, New YorkGoogle Scholar
  86. Udo de Haes HA (2006) How to approach land use in LCIA or, how to avoid the Cinderella effect? Comments on ‘key elements in a framework for land use impact assessment within LCA’. Int J Life Cycle Assess 11:219–221CrossRefGoogle Scholar
  87. Udo de Haes HA, Jolliet O, Finnveden G, Hauschild M, Krewitt W, Mueller-Wenk R (1999) Best available practice regarding impact categories and category indicators in life cycle impact assessment. Int J Life Cycle Assess 4:66–74Google Scholar
  88. Udo de Haes HA, Finnveden G, Goedkoop M, Hauschild M, Hertwich EG, Hofstetter P, Jolliet O, Klopffer W, Krewitt W, Lindeijer E, Mueller-Wenk R, Olsen SI, Pennington DW, Potting J, Steen B (eds) (2002) Life-cycle impact assessment: striving towards best practice. Society of Environmental Toxicology and Chemistry (SETAC), PensacolaGoogle Scholar
  89. UNEP (2003) Evaluation of environmental impacts in life cycle assessment, United Nations Environment Programme, Division of Technology, Industry and Economics (DTIE), Production and Consumption Unit, ParisGoogle Scholar
  90. Vigon BW, Jensen AA (1995) Life cycle assessment: data quality and databases practitioner survey. J Clean Prod 3:135–141CrossRefGoogle Scholar
  91. Weber M, Borcherding K (1993) Behavioral influences on weight judgments in multiattribute decision making. Eur J Oper Res 67:1–12CrossRefGoogle Scholar
  92. Weidema BP, Wesnæs MS (1996) Data quality management for life cycle inventories—an example of using data quality indicators. J Clean Prod 4:167–174CrossRefGoogle Scholar

Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • John Reap
    • 1
  • Felipe Roman
    • 1
  • Scott Duncan
    • 1
  • Bert Bras
    • 1
  1. 1.Sustainable Design and Manufacturing Program, Systems Realization Laboratory, The George W. Woodruff School of Mechanical EngineeringGeorgia Institute of TechnologyAtlantaUSA

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