Embodiments of the present invention are directed to a computer implemented web based unified workflow management system and method for reducing complexity and building repeatable mainframe workflows by creating and managing workflow tasks associated with at least one mainframe workflow. The system and method provide a workflow creation engine for creating at least one mainframe workflow task associated with the at least one mainframe workflow, the at least one mainframe workflow task including an execution target destination, a mainframe process, and a success criteria. The system and method further provide a web dashboard that displays the details and results of the mainframe workflow tasks associated with a mainframe workflow, and allows a user to monitor and control the mainframe workflow, and its associated tasks. The system and method further comprise a workflow task dependency manager for creating global task dependencies between tasks associated with the at least one mainframe workflow.