考虑样本充分性和最小样本量的测试性试验方案设计

Testability Test Scheme Design Considering Sample Adequacy and Minimum Sample Size

提出了一种考虑了样本覆盖充分性和最小样本量的测试性试验方案设计方法。该方法以产品的FMECA的结果为输入,以功能电路级故障模式为基础,从每个故障模式中随机地选取一个样本进行故障注入试验,以故障率为权重对故障检测率和故障隔离率进行计算。这种方法可实现在样本覆盖最充分的情况下样本量最小,减轻了故障注入试验的工作量,可以对产品的测试性指标做出基于试验结果的快速评估。

A design method of coverage adequacy and minimum testability verification test scheme considering sample sample size is proposed. It takes the FMECA results of products as its input and the functional circuit level failure mode as its basis. While implementing the scheme, a sample will be randomly selected from each failure mode to carry out fault injection test, and failure rate will be used as weight to calculate the FDR and FIR. The method can realize the smallest sample size under the condition that the sample coverage is the most adequate, can reduce the work load of fault injection test and can make a rapid evaluation of the testability index of products based on test results.