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New Zealand Plant Protection 66 (2013): 1-9

A review of methods for assessing and managing market access and biosecurity risks using systems approaches

L.E. Jamieson, H.N. DeSilva, S.P. Worner, D.J. Rogers, M.G. Hill and J.T.S. Walker


Systems approaches to managing risks on a pathway are increasingly seen as alternatives to single-point risk management treatments applied at the border. One key challenge of systems approaches is the difficulty in measuring risk management effectiveness across an entire pathway comprising many complex processes. The World Trade Organisation (WTO) agreement on the application of Sanitary and Phytosanitary measures (SPS) states that measures must be applied only to the extent required to achieve an appropriate degree of sanitary/phytosanitary protection (not unnecessarily traderestrictive) and must use science-based risk assessment. The framework for import risk analysis within the scope of the International Plant Protection Convention (IPPC) is outlined in the International Standards for Phytosanitary Measures (ISPMs). Although a systems approach and independent risk reduction system processes are described in various ISPMs, the methodology for determining risk across an entire pathway with complex processes is not. This contribution reviews methodologies with potential for such use.

Keywords: pathways, risk analysis, Bayesian belief network, Monte Carlo simulation, data mining, machine learning, expert opinion, multiple models.

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