I tried for years to conduct HALT tests. "No need" they said, and I
tried again and again to incorporate HALT into the R&D qualification
process.
Then came a customer, who required this in the contract. We made no
preparations and passed.
"You see", they said, "we told you".
"Well", I said, "The system is over-designed".
But they already went away.
Regards
Ofer Cohen
Manager
Quality Assurance, Reliability and Production Technologies
Seabridge Ltd. - A Siemens Company
Siemens COM FN A SB
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Phil Nutting
> Sent: Tuesday, June 28, 2005 5:22 PM
> To: [log in to unmask]
> Subject: Re: [TN] HALT&HASS&MTBF
>
> Ingemar,
>
> We have uses HALT for initial design testing with HASS as follow-on
> production testing. It is not cheap, but we were able to find
> weaknesses in the design. IMO, by association, that should bring
better
> MTBF. We perform these tests on our complete assembly. That is where
> we see the most interaction.
>
> Another test we are performing is the shipping packaging test. With
the
> completed working unit packed in it's special packaging materials, the
> unit is placed on a shaker table for 1 hour and then dropped 12 times
on
> different faces, edges and corners. This has been very useful. An
> electrically well designed unit is of no use if it can't get to the
end
> user without breaking.
>
> Phil
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Ingemar Hernefjord
> (KC/EMW)
> Sent: Tuesday, June 28, 2005 10:54 AM
> To: [log in to unmask]
> Subject: [TN] HALT&HASS&MTBF
>
> Anyone out there who use these and really got higher MTBF? And was it
> worth the cost?
> Not much discussed about in TN? Maybe wrong forum?
> Just in case someone was applying HALT&HASS.
> My very q is this: can you apply this on whole equipment, or just on
> single functions or
> reduced areas because of too many parameters?
> Cheers
> Ingemar Hernefjord
> Ericsson Microwave Systems
>
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