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Characteristics of the Engineered System
- 1. Functional purposes in response to identified needs
- 2. Engineered systems operate over a life-cycle
- 3. Combination of resources
- 4. A composition of sub-systems that interact with each other to
- produce a desired system response or behavior.
- 5. Part of a hierarchy and influenced by external factors from parent
- and sibling systems
- 6. Interact with the natural world in desirable and undesirable
- ways.
- 7. Engineered systems are embedded into the natural world and
- interact with it in desirable as well as undesirable ways.
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What is a single entity product system
- Product itself is not a system (e.g. bridge)
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What is a product entity product system
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What is the systems engineering process?
- The Systems Engineering process can be used to create the most utility for
- the least cost, in terms of product cost, product service cost, social cost, and
- environmental costs
- - understand needs
- - define requirements
- - design from a life cycle perspective
- - consider relationships
- - top-down approach: FORM FOLLOWS FUNCTION; dont think about product first, think about function
- - disciplined approach
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Three different system engineering process models
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vee mode: difference b/w system integration and verification and system demonstration and validation
- system integration and verification - was it built right?
- system demonstration and validation - did we build the right system
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DDPs vs. DIPs for TPMs?
- DDPs
- • System life time
- • Weight
- • Reliability
- • Producibility
- • Maintainability
- • Disposability
- DIPs
- • Labour rates
- • Fuel cost per Litre
- • Material cost per pound
- • Interest rates
- TPMs are used to evaluate and compare DDPs
- Technical performance measures are the predicted or estimated values
- for the DDPs - the value of the DDP
- • Design criteria are desired values for TPMs as specified by the
- customers requirements
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benefits from systems engineering
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