Report: APP CMHS Project 4

CSIRO advises that the information contained in this comprises general statements based on scientific research. The reader is advised and needs to be aware that such information may be incomplete or unable to be used in any specific situation. No reliance or actions must therefore be made on that information without seeking prior expert professional, scientific and technical advice. To the extent permitted by law, CSIRO (including its employees and consultants) excludes all liability to any person for any consequences, including but not limited to all losses, damages, costs, expenses and any other compensation, arising directly or indirectly from using this publication (in part or in whole) and any information or material contained in it.

2.1.8. Risk Analysis Techniques

There are three broad styles of risk analysis used within the risk assessment – quantitative, semi-quantitative and qualitative.

  • Quantitative analysis is used where there is significant potential for major accidents. It uses a statistical and factual basis to estimate the actual risk of injury. It is critical to have valid auditable data on which to base the analysis.

  • Semi-quantitative analysis combines qualitative and quantitative techniques in the risk ranking step. Typically, a quantitative measure is used for estimating consequence (such as fatality frequency rate for a particular task, such as drilling) and a qualitative measure used for estimating likelihood.

  • Qualitative analysis uses a simple risk ranking matrix and assigns values or rank based on personal experience only. The assessment of likelihood and consequence are not based on fact and are not justifiable numbers, they are simple rankings based on group experience and consensus.

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