There is increasing policy interest in the appraisal of
options, as adaptation moves from theory to practice. At the same time,
it is recognised that the appraisal of climate change adaptation
involves a number of major challenges, particularly the consideration
of uncertainty. In response, a number of existing and new decision
support tools are being considered for adaptation.
The
European Commission FP7 funded MEDIATION project (Methodology for
Effective Decision-making on Impacts and AdaptaTION) is looking at
adaptation decision support tools, in line with its objectives to
advance the analysis of impacts, vulnerability and adaptation, and to
promote knowledge sharing through a MEDIATION Adaptation Platform. To
complement the information on the Platform, a series of Policy Briefing
Notes have been produced on Decision Support Methods for Climate Change
Adaptation.
An overview of all the decision
support tools reviewed is provided in
Policy Briefing Note 1:
Method Overview, which summarises each method, discusses the
potential relevance for adaptation and provides guidance on their
potential applicability. The methods considered include existing
appraisal tools (cost-benefit analysis, cost-effectiveness analysis and
multicriteria analysis), as well as techniques that more fully address
uncertainty (real options analysis, robust decision making, portfolio
analysis and iterative risk (adaptive) management). It also includes
complementary tools that can assist in adaptation assessment, including
analytical hierarchic processes, social network analysis and adaptation
turning points. Additional information on each method is presented in
separate Policy Briefing Notes (2 – 10).
This
Policy Brief (Note 2) provides a summary of
cost-effectiveness
analysis. It provides a brief synthesis of the approach, its strengths
and weaknesses, the relevance for adaptation, how it considers
uncertainty, and presents case study examples. It is stressed that this
note only provides an overview: more detailed information is available
in MEDIATION deliverables, and sources and links on the MEDIATION
Adaptation Platform.