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首页> 外文期刊>International Journal of Industrial Ergonomics >Requirements analysis for customization using subgroup differences and large sample user testing: A case study of information retrieval on handheld devices in healthcare
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Requirements analysis for customization using subgroup differences and large sample user testing: A case study of information retrieval on handheld devices in healthcare

机译：使用亚组差异和大量样本用户测试进行定制的需求分析：医疗保健手持设备上信息检索的案例研究

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摘要

Requirements analysis defines the goals and evaluation criteria of system design. We introduce a methodology for requirements analysis for customization based on large sample interactive testing, with the premise that analysis of user behaviour with prototypes leads to requirements discoveries. The methodology uses a relatively large sample (1) to identify relevant user subgroups, (2) to observe significant empirically determined group differences in the context of task and tool use and (3) to estimate the groups' different requirements and derive design implications. Between 20 and 50 participants are used per test, rather than the three to five often recommended for user testing. Statistical relationships are investigated between subgroups in terms of background variables, questionnaire items, performance data, and coded verbal statements. Customization requirements are inferred from the significant differences observed between empirically determined groups. The methodological framework is illustrated in a case study involving the use of clinical resources on handheld devices by three groups of physicians. The groups were found to have different needs and preferences for evidence-based resources and device form factor, implying opportunities and necessities for group customization requirements. Relevance to industry: In safety-critical domains such as health care, it is essential to assess user needs and preferences regarding devices and systems to inform appropriate customizations. We present a methodological framework and case study that demonstrates how large sample user testing can supplement typical methods of requirements analysis to provide contextualized, quantitative accounts of group differences and customization requirements.
机译：需求分析定义了系统设计的目标和评估标准。我们介绍了一种基于大样本交互式测试的定制需求分析方法，其前提是使用原型对用户行为进行分析可以发现需求。该方法使用相对较大的样本（1）识别相关的用户子组;（2）在任务和工具使用的背景下观察根据经验确定的显着的组差异;（3）估计组的不同要求并得出设计含义。每次测试使用20至50名参与者，而用户测试通常不推荐3至5名参与者。根据背景变量，调查表项目，绩效数据和编码的语言陈述，对子组之间的统计关系进行了调查。从经验确定的组之间观察到的显着差异可以推断出定制要求。案例研究说明了方法框架，该案例研究涉及三组医师在手持设备上使用临床资源的情况。发现这些小组对基于证据的资源和设备形式因素有不同的需求和偏好，这意味着满足小组定制要求的机会和必要性。与行业的相关性：在诸如医疗保健等对安全至关重要的领域中，至关重要的是评估用户对设备和系统的需求和偏好，以告知适当的定制。我们提供了一个方法框架和案例研究，该案例研究证明了大样本的用户测试可以如何补充需求分析的典型方法，从而提供针对群体差异和自定义需求的语境化量化账户。

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