Learning Targets
- Generate multiple possible concepts before choosing one.
- Use criteria to compare mechanism options fairly.
- Explain how decision matrix results support the selected concept.
IED Unit 4 • Lesson 4.11
Concept Generation and Decision Matrix
Focus question: How can engineers choose a mechanism concept using evidence and criteria?
Your lesson guide
Objective
Generate multiple possible concepts before choosing one. Use criteria to compare mechanism options fairly. Explain how decision matrix results support the selected concept.
Materials
For the online work: a browser and your engineering notebook. Follow the activity’s materials list for any physical build, and get teacher approval before using equipment.
Plan your time
Suggested work block: 45–60 minutes. Physical builds and projects may span several classes; follow your teacher’s schedule.
Mission Briefing
Today’s Plan
Use this page with the lesson presentation, your engineering notebook, and the tools or evidence assigned for Generate and Select a Mechanism Concept.
Success Looks Like
You can generate mechanism concepts and use a decision matrix to support a concept selection.
LaunchLearnApplyCheckSubmit
Opening Prompt
How can engineers choose a mechanism concept using evidence and criteria?
Connect your response to the decision, evidence, or quality standard required for Generate and Select a Mechanism Concept.
Reveal: useful engineering move
This lesson is ready to move forward when the evidence meets this standard: The selected concept follows the matrix evidence and is not chosen before alternatives are compared.
Core Skill
What We Are Practicing
Concept generation prevents teams from locking into the first idea too soon.
A decision matrix turns criteria into a more transparent comparison.
Scores should be explained with evidence, not used as magic answers.
Your Task
Generate and Select a Mechanism Concept
Develop multiple system concepts and use a decision matrix to choose one based on evidence and challenge criteria.
- Create at least three meaningfully different concepts.
- Label the proposed mechanism and expected input/output.
- Establish weighted criteria using prior lesson evidence.
- Score the concepts and justify the selected direction.
Quality check: The selected concept follows the matrix evidence and is not chosen before alternatives are compared.
Lesson Interactive
Use a Weighted Decision Matrix
Calculate weighted concept scores instead of choosing a favorite concept.
Weights and Ratings
| Criterion | Weight | Concept A | Concept B | Concept C |
|---|---|---|---|---|
| Performance | 5 | 4 | 3 | 5 |
| Low mass | 3 | 2 | 5 | 3 |
| Low cost | 2 | 4 | 3 | 2 |
| Weighted total |
Multiply each rating by its criterion weight, add the products, and select the highest total.
What You Will Submit
Concept Selection Package
Submission standard: The selected concept follows the matrix evidence and is not chosen before alternatives are compared.
Resources
Lesson Resources
Lesson 4.11 PowerPoint
Use the lesson slides for guided practice, interactive checks, and the exit ticket.
Introduction to Engineering Design
Return to the IED course hub for units, resources, certifications, and current course information.
Build your lesson report
Checkpoint: is your evidence ready?
- Check calculations, units, labels, and measurements against the activity requirements.
- Record what actually happened, including unexpected results.
- Explain what you changed and why; attach required drawings, photos, CAD, or code in your classroom assignment.
Submit the evidence specified in the activity and your classroom assignment. The report below collects your notes, calculations, observations, and reflections; attach any required drawings, photos, CAD, or code separately.
A PDF download is not a submission. Review it, then upload it and any required attachments through your classroom assignment system.