U3b-L2 November 15, 2007 DRILL – Answer the following in complete sentences. Technology performs a task by using an object that is not part of ____________? What is a system? 1. The human body. 2. A system is a technology or process that has parts and each part has a relationship with all other parts and the whole.

U3b-L2

U3b-L2 What do you think? Speculate about the steps that were followed to create such an amazing innovation. What are your thoughts about the impact of such a technological development. The “scramjet,” an engine so blindingly fast that it could carry an airplane from San Francisco to Washington, DC, in about 20 minutes—or even quicker.

U3b-L2

THE SCIENTIFIC METHOD Explanation U3b-L2 Explanation There are a variety of formal and informal problem-solving strategies. The engineering-design process: Systematic problem-solving strategy Criteria and constraints Used to develop many possible solutions to a problem THE SCIENTIFIC METHOD Criteria – a standard on which a judgment or decision may be based.

U3b-L2 Exploration Working in groups, arrange the cards in the order that engineers might have used to develop the Scram Jet. What might the engineers have been thinking about and doing in each step as they developed the Scram Jet? Present and defend your thoughts on the order of the tasks. What do you think each step might include?

ENGINEERING DESIGN PROCESS U3b-L2 ENGINEERING DESIGN PROCESS Clearly Defined Steps: Defining a problem Brainstorming Researching and generating ideas Identifying criteria and specifying constraints Exploring possibilities Selecting an approach Developing a design proposal Making a model or prototype Testing and evaluating the design, using specifications Refining the design Creating or making it Communicating processes and results

ENGINEERING DESIGN PROCESS U3b-L2 ENGINEERING DESIGN PROCESS Design problems are seldom presented in a clearly defined form. b. Design needs to be continually checked and critiqued, refined and improved. c. Risk analysis is used to minimize the likelihood of UNDESIRED OUTPUTS of a new technology. d. Reduce the chance of system failure – Performance Testing small-scale models computer simulations analogous systems least reliable parts

ENGINEERING DESIGN PROCESS U3b-L2 ENGINEERING DESIGN PROCESS

DUE MONDAY CLASSWORK / HOMEWORK U3b-L2 CLASSWORK / HOMEWORK Read the handout on Adaptive Device Design. Complete the exercises under “State the Problems” on the last page. For #2, list each step of the design process and how each is used in your development of a new or improved product. This is NOT a team exercise – it is an individual exercise. What you do not finish in class today, complete for homework. Write neatly. Expand yourself with this assignment – don’t just “get it done.” DUE MONDAY