Craig,
Both to answer your question. It is not only wine ... Coffee, tea, sparkling waters, still waters, cheeses, etc. are quality controlled tested in similiar methods.
An oenologist, A winemaker, An owner of a restaurant sampling to purchase objectives, or hotel Bar Sommeliers, Media and Press Relations Wine Reporters and Columnists, etcetra as well as for Competitive Awards such as the Bacchus Gold, Silver and Bronze or International Wine Challenges which are frequently held in NYC, San Francisco and other very large USA cities and London, Beligum, Germany, Tokoyo etc.
Hope this answers your question.