Rod Speed ha escrito:

Michael Kennedy wrote:

Separate matter entirely to the mindlessly silly claim that
its even possible to design an appliance to break about a
year after the warranty runs out, with most appliances.

Why do you say it is impossible?

Because it is impossible ? Novel concept I realise.


Please explain how the manufacturer of a light bulb, fluorescent lamp
or CFL can provide an estimate of the lifetime of the lamp. Don´t say
"They can´t because it´s impossible". Explain exactly why it´s
impossible.


When designing the product the engineers figure the average useage of the appliance every day and
then calculate about how long it will take before a failure.

Nice theory. The reality is that that isnt even
possible with most domestic appliances.

It isnt even feasible with stuff as basic as an incandescent light bulb.
A CFL in spades. A moulded power cord or plug pack in spades.

They also do product reliability testing to see how long on average it is before a product fails.

No they dont with domestic appliances.

They dont even do that with mass market hard drives anymore.


Yes they do. The quote the useful lifetime of a hardrive in MTBF hours.
Don´t answer "it´s impossible" if you are not prepared to give a real
explanation. Samsung, Seagate, WD... any decent hard drive manufactures
gives an estimate lifetime of their products. These estimates are
provided in the datasheet of each harddrive.