Through reusing software test components, automated software testing generally costs less than manual software testing. There has been much research on how to develop the reusable test components, but few fall on how ...Through reusing software test components, automated software testing generally costs less than manual software testing. There has been much research on how to develop the reusable test components, but few fall on how to estimate the reusability of test conlponents for automated testing. The purpose of this paper is to present a method of minimum reusability estimation for automated testing based on the return on investment （ROI） model. Minimum reusability is a benchmark for the whole automated testing process. If the reusability in one test execution is less than the minimum reusability, some new strategies must be adopted ill the next test execution to increase the reusability. Only by this way, we can reduce unnecessary costs and finally get a return on the investment of automated testing.展开更多
Before you start your own clinical trial,you should empower yourselves the literature appraisal tool.Below is the first chapter of a whole series of evidencebased teaching manual.After reading the manual,you will be a...Before you start your own clinical trial,you should empower yourselves the literature appraisal tool.Below is the first chapter of a whole series of evidencebased teaching manual.After reading the manual,you will be able to appraise other authors"articles with confidence.Chapter one deals with simple statistics for clinicians.Normal distribution and probability of "1 in 20"are fundamental to statistical testing.Central limit theorem suggests sample size of at least 30.Forest plot,point estimate and confidence intervals are explained,together with the difference between staffs- tical significance and clinical significance.Student t test is used in parametric testing while chi square test is used in Non-parametric test.展开更多
基金Foundation item： the National Natural Science Foundation of China （No. 90718037）
文摘Through reusing software test components, automated software testing generally costs less than manual software testing. There has been much research on how to develop the reusable test components, but few fall on how to estimate the reusability of test conlponents for automated testing. The purpose of this paper is to present a method of minimum reusability estimation for automated testing based on the return on investment （ROI） model. Minimum reusability is a benchmark for the whole automated testing process. If the reusability in one test execution is less than the minimum reusability, some new strategies must be adopted ill the next test execution to increase the reusability. Only by this way, we can reduce unnecessary costs and finally get a return on the investment of automated testing.
文摘Before you start your own clinical trial,you should empower yourselves the literature appraisal tool.Below is the first chapter of a whole series of evidencebased teaching manual.After reading the manual,you will be able to appraise other authors"articles with confidence.Chapter one deals with simple statistics for clinicians.Normal distribution and probability of "1 in 20"are fundamental to statistical testing.Central limit theorem suggests sample size of at least 30.Forest plot,point estimate and confidence intervals are explained,together with the difference between staffs- tical significance and clinical significance.Student t test is used in parametric testing while chi square test is used in Non-parametric test.
