Widely used systems that provide functionality comparable to the Scheduler include
Each of these systems provides a wide variety of scheduling functionality. In terms of such functionality, the goal for the Scheduler is to provide the important core features found in these tools, not the full range of features found in all of them. The Scheduler does provide modest functional improvements in three areas, when compared to most commercially available tools. These improvements are:
A detailed review of each related tool follows in these subsections:
Following these reviews, a summary of the features is provided in a feature comparison matrix.