APSC 101 Lecture Notes - Lecture 7: Volumetric Flow Rate, Storage Tank, Hydrostatics

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Certain features of a system, present or not, are requirements to have for a solution. Some other features distinguish stakeholder satisfaction, which become evaluation criteria. There will always be minimum requirements, or "must haves" Evaluation criteria helps differentiate based on levels of satisfaction since it describes how well it performs for stakeholders. Engineers determine design parameter values, which will dictate product attributes that stakeholders will consider. Each parameter may have impacts on more than one attributes. For example: case material translates to cost and mass, battery capacitor translates to usability, processor translates to speed. Attribute on x-axis, satisfaction (sometimes smiley face) on y-axis ranges from 0-100% Provides a means by which to quantify performance for a single evaluation criterion from the target design specs. For a solution that is unsatisfactory, it will usually be a requirement. It may seem like a linear line, but doubling the storage does not necessarily mean double the satisfaction.

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