该方法包括对豆类的外表面进行目视检查，以识别那些被昆虫破坏的豆类。确定受损豆类的观察比例（以百分比表示），并在可能的情况下确定对受损负有责任的昆虫种类。根据由此确定的受损豆比例:估计给定概率下受损豆真实比例的置信限；对受损大豆的真实比例不超过给定值的概率的估计。 附件A显示了受损大豆的图示。附录B描述了实验室样品均匀性试验。

The method consists in visual examination of the external surface of beans to identify those which have been damaged by insects. Determination of the observed proportion, as a percentage, of damaged beans and, if possible, identification of the species of insect responible to damage. From the proportion of damaged beans thus determined: estimation of the confidence limits of the true proportion of damaged beans for a given probability; estimation of the probability that the true proportion of damaged beans will not exceed a given value. An annex A shows illustrations of damaged beans. An annex B describes a test for homogenity of the laboratory sample.