APPLICATION Engineering Design Process Define the Problem Research and Explore – Research issues you’ll need to understand to solve the problem. List these research items and where you’ll find information. – Explore ideas - Brainstorm multiple solutions Choose the Best Solution Specify Criteria (requirements) and Constraints (limits) – Example, “So, your challenge would be to find out how to meet the criteria (requirement) of receiving good grades under the given time constraints.” – Example: “What were the criteria used to pick a winner?”

Example: You decide you want to build your dock right in front of a public park, and the waterway has endangered salmon in it. What are some of the constraints (other than cost) that may affect your project? Phrase it: “__________________ would be a constraint. This is a limitation on the project because____________.”Constraints

Engineering Design Process Build a Model Test Evaluate Success, Trade-offs and Unintended Consequences, – evaluate success: Was your design successful in meeting the criteria given the limits? – Example: “The car passengers survived even though the car crashed. The air bags and crumple-zone bumper worked!” – Trade-offs: something acceptable but not ideal – Example: “The car passengers are very bruised from the air bags but they lived!” – Unintended consequences: a situation you did not anticipate resulting from your design/solution – Example: “Cars must be sent to the junk yard once all safety features have been activated.” Redesign to optimize

Today’s Agenda Crash test dummy clips mOg mOg 2zOW8 2zOW8 Intro Egg Drop

Egg Drop Using the Engineering Design Process 1. Problem: – Design a container that will keep an egg from breaking when dropped from the school roof. 2. Criteria and Constraints: Teachers – The container must be as low in mass and as small in size as possible – Egg will be provided day of the drop – No parachutes, propellers, or gliders, Helium balloons… – No glass or anything dangerous – No motors or engines of any kind – The egg must be returned in original condition for points

3. Research the problem : describe any scientific information needed to solve the problem and how to collect the information 4. Explore Ideas : Describe several possible solutions to the problem, including any useful scientific concepts. 5. Circle your best solution. 6. Draw and label a diagram of your container (separate sheet of paper). Include scientific concepts for how this will protect the egg.

Point Values for Container Size: – 10 cm X 10 cm = 10 points – 20 cm X 20 cm = 7 points – 30 cm X 30 cm = 4 points – Larger = 1 point Mass – Egg mass = 45 g. – Less than 300 g container = 10 points – g container = 7 points – g container = 4 points – 600 or larger = 1 point Did it Survive the Drop? 5 points Did it NOT survive round 1 but did survive round 2? 3 points Did not survive either drop 0 points

Due Friday 9/28: Number 1-6 on design sheet Due Monday 9/29: YOUR CONTAINER!!! You will fail if you do not bring something that is well though out! Due Tuesday 9/30 Your redesigned container Due Wednesday: Analysis (8 pts.) – Constraints: identify TWO constraints of your solution and how it was a limitation for you during the project. – Unintended consequences: Describe one unintended consequence of your chosen solution. – How did you redesign to optimize your design?

Total Project = 50 points Research, design, analysis Lab paper, container, survival