A method and system of managing work flow in provisioning service orders is provided, particularly telecommunications service delivery orders, where each service order may include of tasks from different worklists from different sources. The method includes merging the worklists and prioritizing tasks in accordance with work-when-ready work flow. The merged worklist provides an end-to-end view on a graphical user interface of all tasks pending to provision each service order. A change of status of a task results in automatically updating both the native and merged worklists. When a task is completed on the native system, the task is automatically deleted from both worklists. Selected search criteria and sorting fields may be used to narrow the displayed results. New tasks created by exceptions are inserted appropriately into the active worklist. The method eliminates the need for a user to log onto different systems to manually prioritize tasks.