The most important objective of the TLP tool is patch set creation. The tool's job is to create individual patch sets that you can easily install. One of the main components of TLP is its phase concept. A snapshot is a closed set of patches, for example a Sun Baseline or an Enterprise Installation Standards CD-ROM (EIS-CD). The snapshot is tagged with a date by the tool. A snapshot becomes a phase when a color designation and a name is assigned to it. Using historical patches ensures that the patches that are included in the snapshot have matured over time. Withdrawn patches, or bad patches, are regularly checked for and replaced in all of the snapshots. The patch analyzer is responsible for determining the applicable patches for a given system.