Engineering Design ProcessThe Big Idea

The Engineering Design Process is a method that is used to solve technological challenges to change and improve products for the way we live.

EngineeringDesignProcess

EngineeringDesignProcess

Identify a problem or needExamine existing ProductsIdentify requirements

Brainstorm for ideasWrite down notes of ideasMake sketches

Select an approachEstablish a scaleMake a scale drawingGet tools and materialsBuild a prototype

Test the prototypeSurvey peopleAnalyze survey dataRedesign if necessary

Apply for a patentMake a commercialSell the productAnalyze profit/loss

• Design is a creative planning process that leads to useful products and systems.

• The systematic application of math, science, and technical principles

• Used to produce tangible end products that meet our needs and desires.

• Modeling, testing, evaluating, and modifying are used to transform ideas into practical solutions.

• The cycle ends when the products satisfies all of the goals related to the criteria.

Modeling

Modifying Evaluating

Testing

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• There is no perfect design– Multiple solutions can exist– Not all work in all environments

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• Requirements for a design are made up of criteria and constraints–Criteria - rules–Constraints - limits

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• ____________for a _________ are made up of criteria and constraints– Criteria - ______________– Constraints - _________

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Rules and Limits

• Criteria- A desired specification of a product. A rule concerning the outcome. – Ex. The chair must support up to 220 lbs and be

able to stack with other chairs• Constraint – A limit to the design process. – Ex. The chair must be ready in 6 weeks and cost

less than $50 each

Factors in Selecting A Structural design

Cost

Style

Function Climate

Building Laws and CodesConvenience

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• Structural Efficiency – a measure of how many “times its own weight” a structure can support.

• Efficiency = Weight held/weight of structure

Safety test today!

Drill: Copy and give examples• Tension – a stretching force, two forces

pulling an object in opposite directions• Compression – a squeezing force, two

forces pushing in on an object from opposite directions

• ***Examples: List an example for each of these forces

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• Torsion is a “twisting” force on an object• Examples of torsion– Turning doorknob– Pedaling a bike

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• Shear force is like compression but the two opposing forces are “offset”

• Example – Scissors– A nail holding a picture on the wall

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• Are the diagonals under tension or compression?

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Only

• Modeling, testing, evaluating, and modifying are used to ________ _____ into practical solutions.

• The cycle ends when the products satisfies all of the _______ related to the ________.

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Factors in Selecting A ________ design

_______

Style

Function _______

Building _____ and CodesConvenience

• There is ____ _______ ________– ______________ solutions can exist– Not all ________ in all ______________

EngineeringDesignProcess