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Waterfall or Agile?
About this app
The same customer portal runs twice: as a waterfall in phases and as Scrum in sprints, week by week. Event cards (new feature, change, cancellation) drop into both lanes in the same week; misunderstandings stay face down until a review or the acceptance test reveals them. Rework appears hatched, and the curves show cumulative benefit and cost up to week 40. Switches for uncertainty, sprint length, feedback and partial deliveries separate the two effects: less rework and earlier benefit.
Subject: Software engineering
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