Learning Targets
- Separate a problem statement from a solution idea.
- Write a clear problem statement.
- Identify criteria and constraints for a design challenge.
IED Unit 0 • Lesson 0.6
Problem Definition, Criteria & Constraints
Focus Question: How do engineers define the problem before designing a solution?
Mission Briefing
Today’s Plan
Practice writing a problem statement that leaves room for multiple possible solutions.
Learning Targets
Success Looks Like…
Your problem statement identifies the need without choosing the final product too early.
Core habit: Define the user, need, criteria, and constraints before generating solutions.
Opening prompt
Problem vs. solution
Criteria + constraints
Classification challenge
Worksheet
Check
Exit
Opening Prompt
What happens when a team chooses a solution too early?
A preferred product can hide the real need and reduce the number of possible solutions.
Quick class share: What is the difference between “build a rocket stand” and “support a rocket safely during setup”?
Reveal the distinction
The problem describes the need. The solution is one possible response.
Good problem definition leaves room for multiple designs that can be compared against criteria and constraints.
Aerospace Context
Launch systems solve multiple connected needs
Observe the number of structures and interfaces surrounding the rocket.
Mindset Shift
Problem vs. Solution
Define the need before naming the final product.
“We are going to build a rocket stand.”
“We need a way to support the rocket safely during setup.”
Core Vocabulary
Criteria, constraints, success, and evidence
Use these terms throughout the design challenge.
Criteria
Goals the design should meet.
Example: supports the rocket securely.Constraints
Limits the design must follow.
Example: approved classroom materials only.Success Criteria
How the team knows the design worked.
Example: does not tip during the stability test.Evidence
Proof used to justify decisions.
Example: sketches, photos, data, and observations.Classification Challenge
Criterion or constraint?
Classify each statement before opening the answer.
A. The launch pad must fit the provided rocket.
B. The design should include a realistic access feature.
C. Teams may use only approved classroom materials.
D. The prototype should stand without tipping.
Reveal the classification
Criteria
B and D describe performance goals.
Constraints
A and C establish required limits or conditions.
A statement may function differently in another project. Classification depends on how the challenge is written.
Activity
Define before brainstorming
Complete the worksheet without selecting a final solution too early.
- Read the scenario carefully.
- Identify the user, need, and reason.
- Write the problem in one or two clear sentences.
- List criteria the design should meet.
- List constraints that limit the design.
- Check that the statement does not assume one final solution.
Mission Debrief
What You Submit
Create the definition that will guide later concept work.
Defined Design Problem
Problem Definition, Criteria & Constraints
Lesson 0.7
Rocket Launch Pad Design Challenge Launch
Open Lesson 0.7Resources
Lesson 0.6 Resources
Use only the files and references that support today’s work.
Lesson 0.6 Student Presentation
Google Slides-friendly 16:9 lesson deck with question slides followed by separate answer-reveal slides.
Problem Definition, Criteria & Constraints
Use this worksheet to separate the need, goals, limits, and success evidence.
Introduction to Engineering Design
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