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“>Change is a fact of life, and even more so in software and User CenteredDesign and development efforts. Natural sources of change during productdevelopment result from the following:Evolution of requirements and business needsDesign changes based upon user and sponsor feedbackDesign evolution due to "leaping eurekas" and opportunisticinsightsAreas like the user experience are not immune to requirements change in otherfacets of a software application or system. For example, 
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