ECE445: The Design ReviewRaj VinjamuriFebruary 3, 2014

Pro Tip: Be Organized!

Always look ahead in the calendar Organize a central repository for your

team (Box/OneDrive/DropBox/Drive/Blue Waters/etc.)

Version control documents and code Hope for the best, plan for the worst– Price, lead time, design margins, etc.

Document your progress throughout– Video and pictures are great for a

portfolio!

What the Design Review is

Structured discussion of your entire project

Defense of the complete electrical design

Design Review should be a stand alone document

‘Requirements and Verification’ section is thought through and thorough

What the Design Review is NOT

Do not prepare a PowerPoint Do not dress up Do not bring in or demonstrate any

hardware Do not bring datasheets for all the

parts you use

Administrative

Mock DR 2/18 - 2/19 (sign-ups open 2/11)

DR week of 2/23 (sign-ups open 2/16)– Don’t forget to sign up to peer-review

another project Grading rubric on the website Description on the website Look at design reviews from past

award-winning projects

Structure/Sections of the Document Modular Block Diagrams Written descriptions of each block

– Similar to proposal, but now includes the detailed design

– Circuit diagrams, design calculations, circuit simulations

– Flow charts for software and algorithms Requirements and Verifications Tolerance Analysis Cost analysis (parts and labor) Schedule Ethics and Safety Citations and References

Block Diagrams

High level overview of components Break into sub-blocks if necessary Clarity is important Not a flowchart

Block DiagramsExamples and Considerations

Growing Degree Day Monitor, Spring 2014

Block DiagramsExamples and Considerations cont.

Ski Computer, Spring 2014

Block Descriptions

Similar to proposal, but includes detailed design

Justify your design Reference your schematics (see

schematics lecture) Flowcharts for software and control Calculations and simulations– Equations and their application– Design feasibility

FlowchartsGoo

dBad

Clearly labeled All decision paths

shown No unnecessary

information

Calculations and Simulations

Power budget Link budget Calculations for component values Simulations of circuit designs

Calculations and Simulations cont.

Requirements and Verification

Requirements– Quantitative operational requirements– Break down into sub-requirements if

necessary

Requirements and Verification cont. Verification–Method to confirm each requirement– Checklist of acceptable results,

quantitative– Debugging plan– “Make sure it works” is not a verification

Requirements and Verification cont. Assign 100 points across all

requirements. – This will be used as a rubric for your

team. Break down functionality into

requirements and what is needed to fulfill the separate requirements

Tolerance Analysis

A part of the design process, not just a test procedure

R/V Table is a guide to goals of tolerance analysis

Actual test procedure in a separate section outside the R&V table

Cost Analysis

Bill of Materials (BOM)– Specific part numbers & component

values–Module that uses it– Price and quantity

Labor costs

Schedule

Week-by-Week Break down tasks Assign responsibility Stick to it

Ethics

IEEE code of ethics– Do not just copy/paste this into your paper– Know and understand it– http://

www.ieee.org/about/corporate/governance/p7-8.html

Discuss ethical concerns as they apply to your project

If no ethical concerns, justify yourself

Safety

Discuss safety concerns– Electrical safety–Mechanical safety– Lab safety– Consider safety of both yourselves and

end users–Make a safety plan if necessary– If few safety concerns, justify yourself

If you have hazardous, or volatile elements of your project, you must create a “Lab Safety Manual”

Citations and References

List of references formatted using the IEEE standard– http://

www.ieee.org/documents/ieeecitationref.pdf

Should include things like…– Textbooks or datasheets where you got

design equations– Informative articles or tutorials used– IEEE code of ethics

Questions?

Mock DR 2/18 - 2/19 (sign-ups open 2/11)

DR week of 2/23 (sign-ups open 2/16)– Don’t forget to sign up to peer-review

another project Grading rubric on the website Description on the website Look at design reviews from past

projects