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System Testing

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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  1. System Testing "You make it, I’ll break it"

  2. 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?

  3. Stressors:

  4. Customer Misuse: • Coffee spillage • Drop in toilet • Use as a seat • Cross-connecting • Reverse polarity • Dirty hands • Unplugging via jerk on cable

  5. Testing requires that you define failure! • Intended application? • Anticipated environment? • Lifetime? • Value vs. time • Sunken ships make good coral reefs in time …

  6. 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: )

  7. 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.

  8. Types of testing, continued • Life test/reliability • Customer misuse • Fluid spillage • Weight test • Keyed connections • Time related • Failure related (MTBF)

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