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Graph-theoretic methods are used to identify edges that disappear under certain operating conditions and prevent a fault from changing the system behavior at this operating point. These operating conditions are identified by validuals, which are indicators obtained during the graph-theoretic analysis. The test generation method is illustrated by a process engineering example.<\/jats:p>","DOI":"10.2478\/v10006-012-0004-y","type":"journal-article","created":{"date-parts":[[2012,3,23]],"date-time":"2012-03-23T15:15:45Z","timestamp":1332515745000},"page":"55-65","source":"Crossref","is-referenced-by-count":4,"title":["Test signal generation for service diagnosis based on local structural properties"],"prefix":"10.61822","volume":"22","author":[{"given":"Michael","family":"Ungermann","sequence":"first","affiliation":[]},{"given":"Jan","family":"Lunze","sequence":"additional","affiliation":[]},{"given":"Dieter","family":"Schwarzmann","sequence":"additional","affiliation":[]}],"member":"37438","reference":[{"key":"1","first-page":"231","article-title":"Towards active diagnosis of hybrid systems","author":"M. Bayoudh","year":"2008"},{"key":"2","first-page":"1498","volume-title":"IFAC Safeprocess","author":"M. 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