A Few Good Reasons to Read or Modify Old Data

•Data-mining old data in new ways that were not formerly tried, to gain new insights. (For example: “Maybe we could predict… if we looked at the old trend for … in a new way.”) •Handling rare business exceptions, such as lawsuits, or unusual customer problems. •Handling repetitive business, such as automated annual renewals (but this would only be moderately old data).