There are many reasons to develop and follow information management policies including the retention/disposition of information. The most obvious reason is to ensure compliance with regulatory retention requirements. Another reason is because of business requirements such as ensuring that data not deemed having long term value is disposed of so that IT resources are not consumed with "junk" data.
I continue to hear companies make the case for the need to have relatively detailed retention/disposition policies is due to their belief that "the law" requires it - in case your company is involved in a lawsuit and eDiscovery. Let me first touch on the first two reasons before I get into the main reason for this blog.