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Is Design Verification Enough?

Posted January 05, 2008 6:30 AM

Comprehensive design verification before building a product presumes you have looked for all possible performance anomalies. But even if you have (a shaky assumption at best), have you checked all of the event sequences that could trigger them? This EE Times article describes a method proposed to address this issue. How can you guarantee that you've done enough?

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user-deleted-1105
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#1

Re: Is Design Verification Enough?

01/05/2008 1:58 PM

The set of tests to show that a product doese what it should is finite...
The set of tests to show that a product doesn't do what it shouldn't is infinite...

Del

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phoenix911
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Re: Is Design Verification Enough?

01/05/2008 4:48 PM

When I designed original equipment, after setting the initial scope on what its supposed to do. when i develop it, I spend quite a bit of time on what could go wrong.

Sounds pessimistic, but when surprises come up, they are very manageable. Seemed to work very good................or maybe I was lucky.

"then I rather be lucky than good."

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Re: Is Design Verification Enough?

01/05/2008 5:13 PM

It's the 'exception testing' that is tricky...what will happen if...
I switch it on with all inputs high, and the pumps stalled and immersed in custard...?
(whilst wearing a paper hat)

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phoenix911
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Re: Is Design Verification Enough?

01/08/2008 1:22 PM

I think I done that, at the time I was wearing 18" high rubbers standing in 20" of "custard" .................... good thing my paper hat didn't get wet, or my day really would have when downhill.

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chtank
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Re: Is Design Verification Enough?

01/06/2008 11:43 AM

Hazops has saved many an astronaut and many a refinery worker's life. Regardless of the purpose any design of any item of any size or complexity must go through a hazop review or face the lawsuits when injury or death is a result. For the manufacturing of appliances sold to the public, too, it is no longer "buyer beware". If the appliance does not perform as expected or advertised, the buyer can also sue for damages. HAZOPS is a must. Note that hazops would include toys that are painted with lead paint in another country.

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