This page brings together resources, tools, training materials and exercises to assist in the development and implementation of a risk-based sampling program. You can access the resources by clicking directly in the graphic shown to the right or by using the hyperlinks that follow in the text below.
Two of the resources – the Proceedings and the RBS Manual Part I – are deliverables from the first ever International Symposium for Risk-Based Sampling held in Baltimore, MD, USA in mid-2017. You can access the event report for the International Symposium here.
Included in the RBS Manual Part I you will find the Hypergeometric Tables (you can also find them as Appendix 2 - page 111) that can assist you in determining the appropriate sample size for inspection based on the lot size, the maximum acceptable infestation level you wish to detect and the desired confidence level that you feel comfortable with. The Hypergeometric Tables can also help you determine the percentage of infestation that would be detected at various confidence levels with various sample sizes.
Another way to determine the sample size is using the Sample Size Calculator. This tool can be downloaded and used to organize data derived from inspections conducted at ports, airports, and border points. In addition, the formulae embedded in the calculator can be used to estimate sample sizes based on Risk-Based Sampling concepts. The Sample Size Calculator was designed for use in a workshop on Best Practices for Risk Management and Risk-Based Sampling held in Peru in 2018.
The RBS Manual Part I also includes a Practical Exercise (you can also find it as Appendix 3 - page 144) that helps you compare the results when conducting inspections using percentage-based versus Risk-Based Sampling.
The RBS Manual Part II is under construction and will be available soon.
The Training Module will assist interested NAPPO and other stakeholders in furthering their understanding of Risk-Based Sampling as a method to conduct agricultural inspections that are technically justified (defensible) to trading partners. The module is divided into several sections and contains exercises to test the learner on their comprehension of the basic concepts.
The RBS video explains why the entire world should be thinking about using Risk-Based Sampling. The presentation was delivered by Mr. Robert Griffin at the 14th meeting of the Commission on Phytosanitary Measures of the International Plant Protection Convention at FAO Headquarters in Rome, Italy in April 2019.
Finally, the References section include a collection of publications, international standards and treaties that are important resources for Risk-Based Sampling.