Task hierarchy management is about planning tasks by creating task structures that include multiple levels of granularity. Task hierarchy management allows making interrelated and flexible structures which form a single task tree. It is often used in project planning and implementation to create a work breakdown structure (which is actually a multi-level tree of work packages), make multiple assignments, set up task dependencies and manage sub-projects.

Without task hierarchy management it would be hard to organize multifaceted projects and processes. Having a flat list of tasks and simple to-do lists does not allow managers and planners to organize tasks by multiple hierarchical levels. Fortunately, task hierarchy management is widely used today and there are software solutions that help create task trees and hierarchical task lists. For example, some people use Microsoft Project task hierarchy to plan work breakdown structures (WBS) and hierarchical to-do lists. Also there is MS Outlook software that allows using task hierarchy SharePoint-based solutions to plan multi-level projects and team tasks. 

MS Outlook task hierarchy allows using simple to-do lists to plan and manage daily tasks. Users can benefit not only from task hierarchy Outlook tools but they can also combine emailing capabilities with task management functionality. That’s why it seems that task hierarchy in Outlook is very convenient. But real practice shows that MS Outlook users often feel confused when setting up permissions to hierarchical tasks and also meet some troubles when trying to make templates by using Folder List (read this comparison review to know more on this point). 

VIP Task Manager is another example of task hierarchy management. VIP Task Manager features Task Tree view that allows creating hierarchical task lists, planning multifaceted projects, setting team assignments, and organizing entire workflows. Comparing to Microsoft Project task hierarchy, Task Tree view provides a framework for much easier project planning and tracking (read this comparison review to learn more). You can develop templates and share tasks for better task hierarchy exchange.

VIP Organizer is a simple tool for task hierarchy management and planning. It is designed for individual use. VIP Organizer will be best for daily task planning and to-do list management.