为了使调查时尽量节省人力物力,采用了尽量减少调查样本量、进行重点抽查,以便发现有比较严重质量问题的“监督型抽样方案”,其原理为批质量保证抽样方法(Lot quality assurauce sampling)以及监督抽样的基本原理,为便于基层使用,设计了两种方案。方案一,规定了七级“接种率期望水平”,并根据相应的抽样样本(进行调查的适龄儿童数)量进行调查,以调查结果判断被监督单位的儿童免疫接种率是否达到了某级标准。方案二,一次抽取相对较多的调查样本,根据调查结果中出现的不合 In order to save manpower and resources as much as possible during the investigation, a “supervised sampling plan” that minimizes survey sample size and spot checks in order to find out more serious quality problems is adopted. The principle is Lot quality assurauce sampling, As well as the basic principle of supervised sampling, two schemes have been designed for the convenience of grass-roots use. In the first plan, the level of “expected level of vaccination rate” is set at seven, and according to the corresponding sample (the number of school-age children under investigation), the investigation is conducted to determine whether the monitored rate of children’s immunization has reached a certain level according to the survey results . Option two, a relatively large sample of the survey, according to the findings of the substandard