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ECE445: The Design ReviewRaj VinjamuriFebruary 3, 2014
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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!
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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
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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
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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
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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
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Block Diagrams
High level overview of components Break into sub-blocks if necessary Clarity is important Not a flowchart
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Block DiagramsExamples and Considerations
Growing Degree Day Monitor, Spring 2014
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Block DiagramsExamples and Considerations cont.
Ski Computer, Spring 2014
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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
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FlowchartsGoo
dBad
Clearly labeled All decision paths
shown No unnecessary
information
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Calculations and Simulations
Power budget Link budget Calculations for component values Simulations of circuit designs
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Calculations and Simulations cont.
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Requirements and Verification
Requirements– Quantitative operational requirements– Break down into sub-requirements if
necessary
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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
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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
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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
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Cost Analysis
Bill of Materials (BOM)– Specific part numbers & component
values–Module that uses it– Price and quantity
Labor costs
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Schedule
Week-by-Week Break down tasks Assign responsibility Stick to it
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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
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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”
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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
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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