Evaluating performance of environmental health assessments
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This is a manuscript about evaluating performance of environmental health assessments. It discusses different perspectives to evaluating the goodness of assessments and proposes a new more comprehensive approach to considering performace of environmental health assessments.
Contents
Abstract
Situation
- environmental health assessment is intentional societal activity involving plural actors with diverse perspectives and needs
- provide information on practical decision-making (political, industry, individuals)
- increase awareness and level of understanding on important issues (experts, DMs, SHs, public)
- advance scientific research (experts)
- effectiveness of assessments must be ensured → performance of assessments needs to be considered and evaluated
- various overlapping perspectives to the issue: uncertainty assessment, quality assurance, model development guidelines, ...
Problem
- all perspectives provide only limited or narrow views to performance
- use purpose of information often not considered
- all aspects of performance not covered
- evaluation as a separate process, often only after assessment
- societal aspect often neglected
- focus either on giving assessment procedure guidelines or considering product as such
Solution
- multi-perspective approach to performance
- quality of content
- applicability
- efficiency
- an integral part of assessment process → applicable also in design and execution (a priori), not only evaluation (a posteriori)
Evaluation
- focus on the mediator (conceptual artifacts) of the overall process
- product|use purpose, assessment process|product
- trialogical process, knowledge creation metaphor
- not only collection and use of existing information or learning to deal with new situation, but also creation of new knowledge
- capable of incorporating the goods from other perspectives into a more comprehensive and coherent approach
- evaluation of performance can only be done meaningfully against purpose
- various intentions need to be identified, explicated and prioritized in all assessments
WARNING: CONTENT BELOW THIS TEXT OUT OF DATE - TO BE REVISED SOONISH
Background
- General assessment framework
- Societal context of assessments
- General purpose of assessments
- to describe reality
- fulfill specific needs
- Open Assessment
- How can performance of environmental health assessments be evaluated?
Methods
Results
- Properties of good assessments
- quality of content
- applicability
- efficiency
- Relation of properties to information structure/content
- Evaluation process
- a priori and/or a posteriori view
- identification of purpose
- evaluation of quality of content (uncertainty + relevance)
- in principle reality, but in practice golden standard as reference point D↷
- evaluation of applicability
- evaluation of efficiency (effort expenditure)
- overall performance
- potential for effectiveness/effort given purpose
- can be further evaluated retrospectively against realized effectiveness (possibly against redefined purpose)
- potential for effectiveness/effort given purpose
Discussion
- Uncertainty as an aspect of performance
- parameter uncertainty
- model uncertainty
- scenario uncertainty
- Data source reliability as an aspect of performance
- Performance exists only against a purpose
- data about hypothesis
Conclusions
- There is more to assessment performance than just statistical uncertainty and data source reliability
- Overall performance of assessment can be evaluated systematically and explicitly
- requires consistent information structure
- a priori evaluation should be made an inherent part of assessment process