Risk ranking & multi criteria analysis
17 important questions on Risk ranking & multi criteria analysis
What are goals of risk ranking methods?
- Transparent approach
- Utilizes available data
- Less demanding than RA (risk assignment )
- Assists sampling and monitoring strategies
What are 6 methods for estimation/ranking risks?
- Comparative risk assessment
- Risk ratio, risk score
- Risk matrix
- The burden of disease( QALY/Daly), cost of illness (CoI), willingness to Pay (WTP)
- Multi-criteria (decision) analyses (MCDA)
- Expert judgement
What do you about expert judgement?
- Most used method
- Humans are able to combine various sources of knowledge
- But.......
- Biases
- Tunnel vision
- Higher grades + faster learning
- Never study anything twice
- 100% sure, 100% understanding
What is comparative risk assessment(1) ?
- Guidelines are available
- Applied to one hazard, when compared: ranking is possible, but not easy.
- Comparative RA evaluates mostly mortality.
What Risk ratio / risk score?
- Risk ratio: exposure / severity
- Risk score: exposure * severity
What is definition of a risk?
What is matrix for food risk ranking ?
- Come visible
Why is food safety policy-making complex?
- Many stakeholders
- Multiple and conflicting objectives
What is the aim of Multi Criteria Analysis (MCA) ?
- Facilitate the comprehension of similarities and differences among the objectives of different stakeholders
- Impose more structure to the decision making problem
What is Multi criteria Decision analysis doing?
What are the 8 steps of Multi Criteria analysis?
- Establish the decision context
- Identify objectives and criteria
- identify the alternatives to be appraised
- 'scoring'
- 'Weighing
- Calculate overall value
- Examine the results
- Sensitivity analysis
What do in step 1 Establish the decision context?
- Problem definition
- Identify stakeholders
What do when 'scoring' alternatives?
- Scoring: quantitative or qualitative scales
- Standardization into 1 common measurement unit
What do you do when 'weighting'?
- How much do stakeholder care
- Weighing these preferences
- Sum over the criteria, per alternative
What does a sensitivity analysis ?
MCA technique is class was simple, because?
- 'scoring' is disputable: there are several methods
- 'Weighing is disputable: subjective
- Do all stakeholder need to have equal influence?
When is MCA is useful for structuring discussions?
- Inclined to focus on the differences
- MCA focus on similarities
- So ranking of the alternatives might not be that different
- MCA creates trust among the different stakeholder
The question on the page originate from the summary of the following study material:
- A unique study and practice tool
- Never study anything twice again
- Get the grades you hope for
- 100% sure, 100% understanding