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System Testing PowerPoint PPT Presentation


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System Testing. "You make it, I’ll break it". Purpose:. Does the product as a whole perform up to specifications? (validation?) Does it perform under normal, upper, and lower limits wrt the environment? Does it meet or exceed all claims?. Stressors:. Customer Misuse:. Coffee spillage

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System Testing

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System testing l.jpg

System Testing

"You make it, I’ll break it"


Purpose l.jpg

Purpose:

  • Does the product as a whole perform up to specifications? (validation?)

  • Does it perform under normal, upper, and lower limits wrt the environment?

  • Does it meet or exceed all claims?


Stressors l.jpg

Stressors:


Customer misuse l.jpg

Customer Misuse:

  • Coffee spillage

  • Drop in toilet

  • Use as a seat

  • Cross-connecting

  • Reverse polarity

  • Dirty hands

  • Unplugging via jerk on cable


Testing requires that you define failure l.jpg

Testing requires that you define failure!

  • Intended application?

  • Anticipated environment?

  • Lifetime?

  • Value vs. time

  • Sunken ships make good coral reefs in time …


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Types of testing:

  • Event testing – cycling, time to failure

  • Environmental – operating & storage

  • Altitude

  • Threshold (door, elevator, bricks… )

  • Vibration

  • ISTA shipping test

  • EMI (standards!, see next slide: )


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EN 1000 series standards

  • Radiated electric field immunity

  • Fast transients

  • Surge, line, magnetic

  • Dips, variations, V, F variation

  • On/off, ESU

  • Walkie-talkie, cell phone

  • ESU, etc.


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Types of testing, continued

  • Life test/reliability

  • Customer misuse

  • Fluid spillage

  • Weight test

  • Keyed connections

  • Time related

  • Failure related (MTBF)


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