Who is to say what variations are
"insignificant"?
The significance of the variation depends on what is being sold, and
is based on what is "reasonable" for the kind of sale. "Reasonable"
is
determined by common sense - what most people would think is OK,
basically.
Some kinds of sales tolerate no variations - works of art, for
example. Any variation would pretty much mean the object is not
original.
Some things can have a little variations, like a chair. The figure of
the wood will be unique to all chairs, but the finish can be
specified.
Some things can have bigger variations, like a pile of crushed cars.
As long as the metal content is there, the makes and models really do
not matter.
And then some things can have pretty wide variations, like a plate of
meatloaf from the diner. Is it made like how my mother made it, or
yours?
In your chip experience, I would say that the differences were
significant enough (by quite a bit) that you have the right to void
the deal. Any court would see that most engineers would not be willing
to swap engineering samples for production parts. However, if the only
difference was perhaps the manufacturer of the chips, the story might
be different. A court might see that most engineers would not care if
their 555 timers were made by Signetics or National.
Remember, the implied warranty is there to protect both the buyer and
the seller.
--
Will