Abstract Relations between requirements are part of nearly every engineering approach. Yet, relations views, such as documents, scarcely considered. This is remarkable documents and their structure a key factor in reuse, which still challenging. Explicit formalized can help to ensure consistency, improve completeness, facilitate review activities general. For example, this relevant space engine...

Positivist and interpretivist researchers have different views on how their research outcomes may be evaluated. The issues of validity, reliability and generalisability, used in evaluating positivist studies, are regarded of relatively little significance by many qualitative researchers for judging the merits of their interpretive investigations. In confirming the research, those three canons n...