November 5, 2008
DRILL – Write the sentence and answer True or False
1. Constraints are new products, systems, or
processes that have never existed before.
1. False – Constraints are limits.
2. An engineer is, in essence, a problem-solver.
2. True
3. Feedback is used to regulate or control a
technological system.
3. True
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UNIT 3 – Engineering Design
Engineering, the systematic
application of mathematical,
scientific, and technical principles,
produces tangible end products
that meet our needs and desires.
What is a systematic application of something?
– an organized or established procedure
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UNIT 3 – Engineering Design
a.
Getting familiar with the Big Idea
b. The Design Process
c.
d.
e.
f.
g.
h.
i.
j.
Core Technologies
Mechanical Engineering
Electrical Engineering
Reverse Engineering
Fluid Engineering
Thermal Engineering
Optical Engineering
Materials Engineering
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The Engineering Design Process
PURPOSE OF LESSON
• To enable students to understand and
apply the design process.
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Technology as a System
• Technology – performing a
by using an
object that is not part of the human body.
• System – each technology has parts and
each part has a
with all other parts
and to the whole.
Every TECHNOLOGY is developed
through a SYSTEM
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Car Engine
1.
What is the
it performs?
2.
How is this a
3.
What are the
1. transfers energy
2. components working in relationship
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Technology as a System
Components:
– Goals
• Humans develop technology to meet needs
• Each artifact meets more than one goal
– Inputs
• Resources
EXAMPLE:
Radarthat go into a system and are used by it
– Processes
•Developed
Mgt. Process,
to Design
determine
Process,
the
Production
positionProcess
and speed
– Outputs
of aircraft. Major impact on military strategies
•during
Technological
WW2.systems are designed to produce specific
outputs.
•Today,
Manufactured
products, constructed
structures,
it
contributes
to
safe,
reliable air
communicated messages, transported people or goods.
transportation
and predicts the weather.
– Feedback
and Control
• Using information about the outputs to regulate the system.
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Technology as a System
A great way to express information is
HOWHOW
DO WE
DO ALTER
WE KNOW
THINGS
IT WORKED???
IF IT DIDN’T?
with a Graphic Organizer
• Technological system:
GOALS
& Control
FEEDBACK
INPUTS
PROCESSES
OUTPUTS
GOALS
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EXAMPLE
• Goal: create a system to send new, sealed
CDs to Wal-Mart.
• Inputs: People, time, capital, energy, etc.
• Processes: design, production, management
• Outputs: CDs
• Feedback:
– Do the CDs work?
• Control:
– Are
they sealed
correctly?
Straighten
printing
of labels
– Do
breakappropriately
easily?
Paythey
workers
– Buy better conveyor belt motor
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HOMEWORK
On a clean sheet of paper, write complete sentences:
1. In what ways is technology a system?
2. List and describe the five major components of a
technological system.
3. Select a technological device that you use and
complete the following:
•
•
•
•
•
Device:
DONE ALREADY
Major Inputs:
Processes: Design, Production, and Management
Desired Outputs:
Undesired Outputs:
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