From Candidate Classes to Completed Design
				Methods used to move to final design: Reuse:  Wherever possible use existing components, or class libraries.  They may need modification. Restructuring:  Change the design to improve, understandability, maintainability, etc.  Techniques include merging similar classes, splitting complex classes, etc. Optimization:  Ensure that the system meets anticipated performance requirements, e.g., by changed algorithms or restructuring. Completion:  Fill all gaps, specify interfaces, etc.
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