Engineering: Engineering Design Process
Using a step-by-step process to solve real-world problems
Engineering: Engineering Design Process
Using a step-by-step process to solve real-world problems
Engineering - Grade 6-8
- 1
List the main steps of the engineering design process in a logical order.
Think about what an engineer does before, during, and after building a solution.
A logical order is: define the problem, research and gather information, imagine possible solutions, plan a design, create a prototype, test the prototype, improve the design, and communicate the results. - 2
A school wants to reduce the number of plastic water bottles thrown away at lunch. Write a clear engineering problem statement for this situation.
A clear problem statement is: Design a solution that helps students use fewer disposable plastic water bottles during lunch while being easy to use, affordable, and safe for the school. - 3
Explain the difference between a constraint and a criterion in an engineering design challenge.
Constraints limit the design, while criteria describe what makes the design good.
A constraint is a limit or rule the design must follow, such as cost, size, time, or materials. A criterion is a goal used to judge how successful the design is, such as strength, comfort, speed, or ease of use. - 4
A team must build a bridge from craft sticks and glue. The bridge must span 40 centimeters, cost less than $5, and hold as much weight as possible. Identify two constraints and one criterion.
Two constraints are that the bridge must span 40 centimeters and cost less than $5. One criterion is that the bridge should hold as much weight as possible. - 5
Why is research an important step before brainstorming solutions?
Think about how background knowledge can save time and improve a design.
Research is important because it helps engineers understand the problem, learn from existing solutions, identify materials and limits, and avoid repeating mistakes. Better information usually leads to better design ideas. - 6
A student says, 'I already have one good idea, so I do not need to brainstorm.' Explain why this is not a strong engineering approach.
This is not a strong approach because brainstorming many ideas helps the team compare options and find creative solutions. The first idea may work, but another idea may be safer, cheaper, stronger, or easier to build. - 7
Look at these possible solutions for keeping a lunch cold: an insulated bag, a frozen water bottle, a small electric cooler, and a lunchbox wrapped in aluminum foil. Choose two ideas to compare and describe one possible advantage of each.
Advantages can include cost, safety, convenience, weight, durability, or effectiveness.
One comparison is an insulated bag and a frozen water bottle. An insulated bag is reusable and can hold the whole lunch, while a frozen water bottle can keep food cold and become a drink as it melts. - 8
What is a prototype, and why do engineers build one before making a final product?
A prototype is an early model of a design. Engineers build prototypes to test ideas, find problems, collect data, and improve the design before making the final product. - 9
A group designs a paper tower that should be at least 60 centimeters tall and support a tennis ball for 10 seconds. Their first prototype is 70 centimeters tall but falls after 3 seconds. What should the team do next?
A failed test gives useful information for improvement.
The team should study why the tower fell, make improvements to increase stability, and test a revised prototype. For example, they could widen the base, add supports, or change how the paper is folded. - 10
During testing, a model car travels 2.4 meters, 2.8 meters, and 2.6 meters in three trials. What is the average distance traveled, and why is using an average helpful?
The average distance is 2.6 meters because 2.4 + 2.8 + 2.6 = 7.8, and 7.8 divided by 3 is 2.6. Using an average is helpful because it gives a more reliable result than using only one trial. - 11
A design team tests two parachutes for a toy figure. Parachute A falls in 4.1 seconds, 4.3 seconds, and 4.2 seconds. Parachute B falls in 3.5 seconds, 3.7 seconds, and 3.6 seconds. If the goal is to slow the fall, which design performs better? Explain.
For a parachute, a longer fall time usually means a slower and safer fall.
Parachute A performs better because it has longer fall times. Its average time is 4.2 seconds, while Parachute B has an average time of 3.6 seconds, so Parachute A slows the fall more. - 12
Name two types of data engineers might collect during a test of a new backpack design.
Engineers might collect data about how much weight the backpack can hold and how comfortable users rate it. They could also measure strap strength, zipper durability, size, or how evenly weight is distributed. - 13
A team improves a water filter after testing it. The first filter cleaned the water slowly but removed most dirt. The second filter cleaned water faster but let more dirt through. What trade-off does the team need to consider?
A trade-off happens when improving one feature can make another feature worse.
The team needs to consider the trade-off between speed and cleanliness. A faster filter may be less effective, while a filter that removes more dirt may take more time. - 14
Why is communication an important part of the engineering design process?
Communication is important because engineers need to share ideas, explain test results, describe changes, and help others understand how and why a design works. Clear communication also helps teams work together and improve future designs. - 15
Choose a common classroom problem, such as messy supply storage, noisy chair movement, or crowded traffic near the door. Describe how you would use at least four steps of the engineering design process to create a solution.
Include steps such as define, research, brainstorm, plan, create, test, improve, and communicate.
One example is messy supply storage. I would define the problem by describing what supplies are hard to find, research storage ideas, brainstorm several possible organizers, build a prototype organizer, test whether students can use it easily, and improve it based on feedback.