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Posing speculative questions about a software system is an important yet often unsupported activity. Current impact analysis techniques tend to focus upon the functionality of the system, whilst the effects of change upon performance requirements are largely ignored until after implementation. This tendency can lead to costly and time-consuming mistakes. Event-Based traceability provides a robust method for handling both long-term evolutionary change as well as the short-term speculative changedoi:10.1109/icre.2002.1048540 dblp:conf/re/Cleland-HuangCSJHX02 fatcat:lexrdbo6e5bnvjsuhwoxgizihu