title: Algorithm used by Fuzzy Group
body: <p>The company I work for purchased data cleansing and matching software to cleanse and match information every night.  It takes about fifteen hours to run.</p>
  
  <p>I have discovered the Fuzzy Group/Fuzzy Lookup component in SSIS, which is extremely fast in my experience by comparison.  I have some questions:</p>
  
  <p>What algorithms do these components use? I have read articles that suggest they use: Soundex, variations of soundex, QGrams and Levenstein Distance or a combination of the four.  Is there any documentation, which explicitly specified which algorithm they use?</p>