There are numerous ways to cup.  Cupping for faults is one of them, as you
clearly described.  Cupping to compare different levels or techniques of
roast is another.  Cupping to compare different varietals is another.
Cupping to find taste compatibility for a blend might be another.  I guess
this could go on and on, with many variations included, and different cupping
techniques for each desired outcome.  Cupping for faults usually involves
using a very light roast that would never be used for consumption, but it
doesn't allow the roast to mask the faults.  As homeroasters, our use for
cupping is most likely to compare roasting techniques or to cup for
determining the best components for a blend.  Those would involve a roast
similar to the way it is intended to be consumed.
Cupping is fascinating to me, and a great way for me to really learn about
differences in various coffees or techniques.  I'd be terrified to have to
cup for the purchase of a container shipment though.  I'll leave that up to
the professionals.
Ed Needham
ed
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