Prev: Total Farce
Next: Toyota drags down new-vehicle quality average; Ford leads Detroit3 gains, J.D. Power says
From: Gordon McGrew on 21 Jun 2010 23:21
On Fri, 18 Jun 2010 15:54:32 -0400, dr_jeff <utz(a)msu.edu> wrote:

>Ray wrote:
>> On Thu, 17 Jun 2010 19:22:37 -0400, dr_jeff <utz(a)msu.edu> wrote:
>>
>>
>>> If every manufactured product had a 2% failure range, then the space
>>> shuttle would never have gotten off the ground, because it is made from
>>> hundreds of thousands of components.
>>>
>> That is 2% for the total system. Richard Feynman predicted that the
>> space shuttle would have that sort of failure. He was proved correct
>> when they have crashed in about 1 in 50 missions.
>
>Look at how many missions were delayed because of problems with the
>computers, motors, fuel leaks, etc. It is far higher than 2% of the
>missions.
>
>Jeff

Exactly. 2% was the catastrophic failure rate. And that was 2% of
all missions, not 2% of all shuttles. Fully 40% of the shuttles were
lost.

From: Derek Gee on 22 Jun 2010 19:39
"dr_jeff" <utz(a)msu.edu> wrote in message
news:gMGdnb5fwv_7oYLRnZ2dnUVZ_rudnZ2d(a)giganews.com...
> Derek Gee wrote:
>> "dr_jeff" <utz(a)msu.edu> wrote in message
>> news:BqydnfsimcxP2oPRnZ2dnUVZ_tednZ2d(a)giganews.com...
>>> One problem with the JD Powers and Assoc. survey is that it combines all
>>> problems. So, if there a problem with a loose screw in the dashboard or
>>> the engine caught fire and the car is trashed, the problems are weighted
>>> equally. Another problem with the survey is that these are owner
>>> reported problems. So the owners of a particular brand or model of car
>>> might be less likely to report a problem than owners of another brand or
>>> model. Finally, this is only during the first 90 days of ownership. So
>>> if a car's brakes completely fail, resulting in a wreck that destroys
>>> the car is not reported at all.
>>
>> What do you mean by the last sentence? If the brakes fail within the
>> first 90 days, it's going to be reported. Why would think it wouldn't?
>
> If the crash occurs on day 91, it is not reported.

I guess that would depend on if the user was included in the Vehicle
Dependability Study for that model year vehicle. Frankly, I wouldn't expect
too many brake failures on day 91.

Derek


First  |  Prev  | 
Pages: 1 2 3 4 5
Prev: Total Farce
Next: Toyota drags down new-vehicle quality average; Ford leads Detroit3 gains, J.D. Power says