User-Oriented Reliability Modeling for a Web System

Authors:
Wen-Li Wang;Mei-Huei Tang
Affiliations:
-;-
Venue:
ISSRE '03 Proceedings of the 14th International Symposium on Software Reliability Engineering
Year:
2003

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Abstract

We develop a user-oriented reliability model, a simple yeteffective approach, to address huge amounts of Web contents,and more importantly tackle users' dynamic navigationbehaviors for a Web system. The users' intrinsic capabilitiesand behaviors, unlike programs' common recurringbehaviors, call for a new approach for modelingthe reliability of an organization's Web system. Our approachdiffers in the modeling scope of the Web systemand the means of modeling user behaviors. We exploit theidea of cyclomatic complexity to cover the maximumnumber of independent paths, which overcome the lesslikely repetitive user navigations, and still maintain thedynamic nature of Web surfing. The modeling processtakes Web servers' access, error, and referrer informationas inputs, and translates them into a flow graph. Atransition tree is then derived from the flow graph, basedon depth-first traversal and dynamic programming. Accordingly,the reliability of the Web system can be computedby excluding those unreliable paths. This model isfurther applied to prioritize the error removal sequence toassist in allocating resources and effort.