Identify best practices for defining a user-specific test plan for "Y2K" (Year 2000 rollover and related date-specific issues) validation. A taxonomy of system elements and features which are likely to exhibit Y2K failures. A user-customizable template for test plans and test scenarios for detection of defective (with respect to Y2K) system elements and features. A user-customizable methodology and process for determining the testing impact of various remediation, validation, and reporting methods. It is not intended that these practices be employable in a mechanical or rote fashion: significant engineering judgment must be exercised by the user of this document in applying its recommendations.