Requirements for each element or component derived from system level goals and requirements
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Alternatives in design
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Experiment prototypes and tests need for design
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Utilization of Knowledge in Design
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Technical and scientific knowledge
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Creative and critical thinking, and problem solving
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Prior work, reuse and reverse engineering
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Modeling, simulation and test
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Multi-Objective Design (DFX)
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Aesthetics and human factors
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Implementation, verification, test and environmental sustainability
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Maintainability, reliability, and safety
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Robustness, evolution, product improvement and retirement
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