Term
| What are the characteristics of the engineered system? |
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Definition
1 - functional purposes in reponse to needs
2 - brought into being and operate over a life cycle
3 - Design momentum builds up and then phases out
4 - Combination of resources
5 - have subsystems and related components
6 - Part of a hierarcy
7 - embedded into the natural world |
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Term
| What are the four parts of concurrent engineering? |
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Definition
Concept/Preliminary Design
Detail Design and Development
Production and or Construction
Product Use, Support, Phase out, Disposal |
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Term
| Characteristics of Waterfall Process Model |
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Definition
| Each pahse is carried out to completion in sequence until the product is delivered. When deficiencies are found, phases must be repeated until the process is correct. |
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Term
| Characterisitcs of Spiral Process Model |
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Definition
| Is iterative and proceeds through the several phases each time a different type of prototype is developed. It allows for an evaluation of risk before proceeding to a subsequent phase. |
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Term
| Characteristics of the "V" Process Model |
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Definition
user needs upper left
user validated system upper right
left side - decomposition and definition
right side - integration and verification
At each level of testing, the originating specifications and requirements documents are consulted to ensure specs are met |
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Term
Where should technical performance measures
be exhibited? |
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Definition
| At the system level. These are the measures for characteristics that are attributes inherent in the design itself |
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Term
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Definition
| The full range of attributes and characteristics that could be exhibited by an engineered system, product or service. These are of interest both to the consumer and the producer. |
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Term
| Design-dependent parameters |
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Definition
| attributes and/or characterstics inherent in the design for which predicted or estimated measures are required (ie design life, weight, reliability, producability, maintainability, pollutability, etc). |
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Term
| Design independent parameters |
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Definition
| factors external to the design that must be estimated and/or forecasted for use during design evaluation (ie fuel cost per pound, labor rates, material cost). These depend upon the production and operating environment of the system. |
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Term
| Technical Performance Measures |
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Definition
Predicted and/or estimated values for DDPs. They also include values for higher level (derived) performance considerations (availability, cost, flexibility, supportability).
Reflect the overall performance characteristics of the system as it accomplishes its mission objectives in response to customer needs. |
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Term
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Definition
| customer specified or negotiated target values for technical performance measures. Also, derived values for TPMs as specified by the customer as requirements. |
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Term
| Elements enabling design sythesis |
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Definition
The Design Team
Traditional and Computer based tools
Combining top-down and bottom-up activities |
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Term
| Elements of System Analysis |
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Definition
Estimating and prediction of DDP values (TPMs)
Determining or forecasting of DIP values |
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Term
| Elements of System Evaluation |
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Definition
Evaluation of candidates
Design Decision |
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Term
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Definition
| Product of applied research - driving force for innovation |
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Term
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Definition
| Perceived success is determined by the customer |
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Term
| Needs, Functions, and Requirements |
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Definition
| ID and specify the desired behavior - the system can now be defined by it's function |
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Term
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Definition
Must include experts and generalists
Experts in each of the product life-cycle phases |
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Term
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Definition
| Creative activity that relies on the knowledge of experts about the state of the art as well as the state of technology. Then a number of design alternatives are fashioned and presented for analysis |
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Term
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Definition
Bottom up - start with set of defined elements, then system
Top-Down - requirements, then system |
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Term
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Definition
| Determining values for cost and effectiveness measures generated during estimation and prediction activities. |
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Term
| What are the potential benefits from Systems Engineering |
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Definition
Reduction in cost
Reduction in system acquisition time
Reduction in risks
More visibility |
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