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软件测试实验室如何满足CNAS计量溯源性要求

计量溯源性是国际间相互承认测量结果的前提条件,CNAS认可委将计量溯源性视为测量结果有效性的基础。在CNAS-CL01:2018《检测和校准实验室能力认可准则》文件中,要求建立并保持测量结果的计量溯源性。针对这一要求CNAS认可委制定了CNAS-CL01-G002《测量结果的计量溯源性要求》应用准则。本文我们就一起来看一下,cnas软件测试机构如何建立实验室的计量溯源性。

 

软件测试领域的计量溯源性指的是信息技术产品检测活动应能追溯到检测人员的操作;检测工具应能显示其实施的检测和检测结论,并能追溯到检测标准和方法。确保检测结果建立在可信的符合检测标准和检测方法的证据之上。

 

计量溯源性要求相关内容的决策需要有实验室最高管理者负责,由质量负责人和技术负责人共同负责组织实施,检测部门负责人、授权签字人、档案管理员、设备管理员、检验检测工程师&项目负责人、监督员、内审员都需要参与进来。

 

根据CNAS-CL01:2018《检测和校准实验室能力认可准则》文件的要求,需要落地的溯源性证据:

1、校准方法的确认记录;

2、测量不确定度评定程序;

3、测量结果计量溯源性的相关文件和记录;

4、确保校准结果有效性的相关文件和记录;

5、人员能力的相关文件和记录;

6、对实验室测量结果有影响的设备记录;

7、设施和环境条件的相关文件和记录;

8、校准服务机构的审核记录(包括外部供方评价和内部审核记录)。

 

首先我们可以梳理软件测试实验室现有计量设备,形成不间断的校准链(溯源图),将测量结果与参考对象相关联,建立并保持测量结果的计量溯源性。可以通过以下方式确保测量结果溯源到国际单位制(SI):

一、选择具备能力的实验室提供的校准;

二、选择具备能力的标准物质生产者提供并声明计量溯源至 SI 的有证标准物质的标准值,当有必要利用参考标准时,应采取足够的措施确保标准在运输过程中以及非固定场所条件下保持稳定的校准状态。应了解参考标准对环境变化或其他相关参数变化的反应和如何有效避免和减轻这些变化及其反应的适当措施,且要形成文件;

三、SI 单位的直接复现,并通过直接或间接与国家或国际标准比对来保证。技术上不可能计量溯源到 SI 单位时,可通过如下方式证明可计量溯源至适当的参考对象:

1、 具备能力的标准物质生产者提供的有证标准物质的标准值;

2、描述清晰的参考测量程序、规定方法或协议标准的结果,其测量结果满足预期用途,并通过适当比对予以保证。

当无法溯源的测量方法和测试工具是新的或进行了重大更新,应采取措施检测测试方法和测试工具的有效性,确保软件测试的“溯源性效果”,提供测试结果可信度。检查措施可包括:

一、对特定测试样例软件进行测试,审查测试样例软件预埋问题的复现情况,确认其偏差。

二、应溯源到权威的测试集规范或其它有关的权威标准或规范,还应提供所得结果与预期结果的比较,并列出已知的缺陷。

三、测试报告应标明测试结果溯源到可获得的国际标准测试集或相关的权威测试集。

四、如果规范与测试用例实现之间存在着重大差异,应说明每个测试用例的实现是如何真实地来源于规范,并保留判定或测量信息。

五、 实验室应规定用于确认每个新版本测试方法或测试工具的程序和方法。可行时,包括对测试环境中使用的工具软件对正确母版本的“溯源性”。

以上就是我们为大家整理的cnas软件评测机构如何建立实验室的计量溯源性的全部内容,如需模板资料可以私信我。