WELCOME TO BE 189!

Today’s Agenda1. Intro to class2. Design Principles3. Intro to LabVIEW4. Exercise Packet

… but first

Pair up!Please split into pairs

Rules:

1. Preference for Non-EEs to pair with EEs

2. Grad students pair with other grad students

Welcome to BE 189:

Design and Construction of Biodevices

Course Website: http://biophot.caltech.edu/ee189/

The Engineering Design ProcessIn pairs, list the steps of the Engineering Design Process:

The Engineering Design Process

*Biodesign: The Process of Innovating Medical Technologies (2015)

Example Process for Small Individual Projects

*Bonus Question: What steps do you think are trickiest for most engineers?

Answer: Defining the criteria from non-technical viewpoints, Generating multiple solutions

IdentifyFor this class, the identifying steps have been done

In general:

1. Observe, observe, observe (field work, surveys, feedback, background research)

2. Be specific3. Criteria must be TESTABLE

IdentifyFor this class, the identifying steps have been done

In general:

4. Get feedback from all “stakeholders”a. Example - If you’re designing a futuristic toaster, investors might like

features like “smart phone interaction”. Meanwhile, the users might only care about toast that doesn’t come out burnt.

Invent1. Brainstorm (you might be doing it wrong…)

a. Don’t judge/contest your ideas prematurely! b. Don’t let fear of not getting the right idea hold you back

Invent2. Choosing an idea

a. NOW you can find flaws in your ideasb. Group by different principles (by funding, by feasibility, by

mechanism of action, etc) to see patternsc. Create an feasibility matrix

i. Create columns with every design requirement

ii. Make a single row and assign values of importance to each design requirement

(e.g. 1 - must achieve, 5 - nice to have)

iii. Add rows for every possible solution and assign values of feasibility (e.g. 1 - easy,

e.g. 5 - I’m not sure that’s possible)

iv. See how the solutions compare to the that top row of importance

Implement & Refine1. Break into modules2. Prototype3. Keep designs as simple as possible4. Gather feedback in every way possible5. Embrace failure and imperfection

a. Don’t get hung up on making everything perfect. You can perfect it in the next iteration. A demonstrably working product is better than a nonexistent perfect product.

ImportanceWhy is following the design process important?

Importance1. Less waste2. Saves money3. Reduces time spent4. Maintains focus5. Safety! (FDA regulations require design controls to ensure safety and

efficacy for patients)