open risk assessment lecture 3: assessment products and their relations
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Mikko Pohjola KTL, Finland. Open risk assessment Lecture 3: Assessment products and their relations. Lecture contents. Assessment products Relations between assessment products Attributes of assessment products. General assessment framework. Assessment products. - PowerPoint PPT PresentationTRANSCRIPT
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Open risk assessment Lecture 3: Assessment products and
their relationsMikko PohjolaKTL, Finland
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Lecture contents⢠Assessment products⢠Relations between assessment products⢠Attributes of assessment products
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General assessment framework
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Assessment products⢠Produced by assessment processes⢠Intended to trigger their use process(es)⢠Formally structured information objects
â Assessment, variable, class⢠Assessments and variables are hypotheses of a
given state of beingâ Development through falsification of hypothesis
⢠Classes are sets of structured information objects⢠All products are objects that develop in time
â E.g. there is no such thing as a draft variable
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General assessment processes
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Assessment⢠Provides âthe answer to a certain specific needâ⢠A collection of variables according to the specific
need⢠Contains also assessment-specific information
â Assessment-level analysesâ Assessment-level conclusions
⢠The implications of contextual factors are described on assessment-level
⢠Example: Benefit-risk assessment on farmed salmon
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Assessment products⢠Variable
â The basic building block of assessmentsâ Description of reality within a defined scope
⢠Scope defined by the specific need (for an assessment)⢠Other content independent of context given scope
â Several different kinds of variables⢠Indicators, end-point variables, decision variables, key
variables, âŚâ Variables can belong to several assessments
⢠Example: Benefit-risk assessment on farmed salmon
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Assessment products⢠Class
â A practical (non-fundamental) kind of objectsâ Classes are collections of variables and assessments
that share a certain property or properties⢠E.g. âClass: Emission variablesâ or âClass: Environmental
health risk assessmentsââ General purpose of class is to describe shared
properties (not to list objects with shared properties)⢠General information may be attributed to a class, and then
utilised in objects belonging to the class⢠Classes are important in making information efficiently re-
usable
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Lecture contents⢠Assessment products⢠Relations between assessment products⢠Internal structure of assessment products
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Relations between assessment products⢠Between levels of complexity
â Context â assessment â variable⢠Causality between variables⢠Membership of classes
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Levels of complexity⢠Assessments belong to context, variables
belong to assessments⢠Context determines assessment (scope),
assessment determines variable (scope)⢠Variables are, however, independent objects,
given their scopeâ A variable can belong to several assessments
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Causality between variables⢠Causal relations are defined within variables
â Variable/definition/causalityâ Representation also in form of causal diagramsâ Causal diagrams are a practical means of presenting
assessments as collections of variables and their relations:
⢠Assessment endpoints⢠Indicators⢠Decision variables⢠Other variables
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Causal diagram
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Membership of class⢠Both assessments and variables can also belong
to classes⢠A loose, non-ontological, relation for practical
management of information objects⢠Membership to a particular class can be based on
any inclusion criterion
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Relations between assessment products
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Lecture contents⢠Assessment products⢠Relations between assessment products⢠Internal structure of assessment products
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Attributes of assessment products⢠All objects have the same attribute structure:
â Name: identifierâ Scope: a question to answerâ Definition: the basis for an answerâ Result: the answer to the question
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Attributes of assessment products⢠Sub-attributes vary from object type to another⢠Attributes of different object types contain different
kinds of informationâ The primary purpose varies between object types
⢠Assessments and variables are descriptions of a hypothesis about a state of being and the process that leads/led to that hypothesis
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Variable⢠Name - identifier⢠Scope â formulation of a question to answer⢠Definition â how the answer is derived
â Causalityâ Dataâ Formulaâ Unit
⢠Result â answer to the question (a hypothesis)â Quantitative whenever possible
⢠Example: Benefit-risk assessment on farmed salmon
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Assessment
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Assessment⢠The implications of context are described within
assessmentâ Scope -> definition -> result
⢠Significant part of assessment content is described within the variables belonging to it
⢠Assessment description also contains case-specific assessment-level information
⢠Example: Benefit-risk assessment on farmed salmon
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Class⢠Name â identifier⢠Scope âwhat objects belong to this class?⢠Definition â description of a shared property or
propertiesâ described in a form directly quotable from other
objects⢠Result â list of member objects
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Summary⢠Three product types:
â Assessment, variable, class⢠Three types of relations:
â belonging/defining, causality, membership⢠Universal attributes:
â name, scope, definition, result