lecture 05 project specifications jc...lecture 05 project specifications jc created date: 9/25/2019...
TRANSCRIPT
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Project SpecificationsBased on lecture slides by Profs. Ayers and Gokirmak
.
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Project Specifications
.
• Specifications listthe requirements that the project must meet.
• any competent engineering team should be able to design a device that performs the specified function.
• Specifications listthe requirements
that the project must meet.
• But do NOT state how to build it.
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Specifications (warnings)
• Modifying an existingdevice ? : Describe the current device in as much detail as possible.
http://dornob.com/portable-power-pods-usb-batteries-keep-gadgets-going/
• In general, you should NOT specify any components.
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Introduction and Overview•State the purpose of the project clearly.
- Why are you building the device?- What will the finished device do?
•Describe the project carefully.- How will the device operate?- What is unusual about the device?
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Be Specific! Technical Specifications
Tabular form: All facts and figures needed to undertake the design
project.
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Specifications Format (example)
Electrical Parameters
Battery Life 6 months (continuous use)Display:
Number of Characters 30 (minimum)Size 2’ min. height x 1.75’ min. widthIllumination Visible in strong sunlight
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Specifications Format (cont.)
Electrical Parameters (cont.)
TransmitterRange 100-1000 feetPhysical path data transmission through walls
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Specifications Format (cont.)
Electrical Parameters (cont.)Operating Voltage LevelsCurrent CapabilitiesInput and Output ImpedancesGainsInput/Output PowerPower ConsumptionPrecision…
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Specifications Format (cont.)
Mechanical Parameters (sample)Button:
Size 5” x 5’’ (min.)Actuation Force 0.001 N (max.)
Weight: 5000 lbs. (max.)Durability:Should survive 10-ft. drops.
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Specifications Format (cont.)
EnvironmentalLocation Basement (6’ underground)Temp. Range -40 to +700 FStorage temp. -273 to 1000 FMoisture?Corrosive liquids?Vibrations?
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Specifications Format (cont.)
Software
Execution time 34.5 seconds (max.)Termination/Reset 1 buttonInterrupts Standard ^CMemory 4.5 MBPlatform Windows PC
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Priorities
• Priority 1 – The requirement is a “must have” as outlined by policy/law
• Priority 2 – The requirement is needed for improved processing, and the fulfillment of the requirement will create immediate benefits
• Priority 3 – The requirement is a “nice to have” which may include new functionality
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Systems Engineering
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Verification and Validation
• Verification– Are you building the system right?
• Validation– Are you building the right system?
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Let’s Give it a Shot• Manual wind-up battery charger
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Let’s Give it a Shot
http://dornob.com/crank-case-rechargeable-wind-up-emergency-batteries/
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Don’t paint self into a corner !Keep in mind • Design time• Implementation time• Debugging• First prototype• First functioning unit …
• Work hard, never panic, keep low-expectations & stick to the K.I.S.S. principle• It is better to beat expectations !!!