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Projects in Statisfy organize tasks in a tree structure — root-level tasks can have subtasks, and milestones unlock an extra level of nesting. This page explains how the hierarchy works and what limits apply.

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Prerequisites

  • An existing project open in the Manage > Projects section
  • Familiarity with adding tasks via the Add Task/Milestone button in the project task grid
  • To reparent tasks via drag and drop, the project must be a Statisfy-native project (see Reorder & Reparent Tasks)

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Task Hierarchy

Every project task exists at a specific level in the tree:
  • Root tasks sit at the top level of the project
  • Subtasks are children of a root task
  • Sub-subtasks are children of a subtask (only available under milestones)
You can add a subtask by clicking the Add Subtask action on any task, or by dragging a task onto another task’s middle drop zone (see Reorder & Reparent Tasks). Project task grid showing a milestone with subtasks and a sub-subtask nested underneath

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Milestones

Milestones are a special task type that represent significant project checkpoints. They differ from regular tasks in one key way: milestones allow one extra level of nesting. To create a milestone, select Milestone as the task type when adding a new root-level task. Add Milestone dialog showing Task Type set to Milestone with the Milestone Name field
Milestones must be created at the root level of a project. You cannot convert an existing subtask into a milestone.

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Depth Limits

The maximum nesting depth depends on the root task type:
Root Task TypeMax LevelsStructure
Regular task2Task → Subtask
Milestone3Milestone → Subtask → Sub-subtask
You cannot nest tasks beyond these limits. If you try to add a subtask or drag a task to a level that would exceed the maximum depth, the operation is blocked.
These depth limits also apply when reparenting tasks via drag and drop — the system checks the full subtree depth of the task being moved to ensure the target location doesn’t exceed the limit.

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How Hierarchy Interacts with Dependencies

Task dependencies can only be created between sibling tasks — tasks that share the same parent. This means:
  • Two root-level tasks can depend on each other
  • Two subtasks under the same parent can depend on each other
  • A root-level task and a subtask cannot depend on each other
If you reparent a task (move it to a different parent), all dependencies on that task will be removed — both where it is a blocker and where it is a dependent. For full details on how dependencies and auto-cascade work with the task hierarchy, see Task Dependencies & Auto-Cascade Dates.

Task Dependencies & Auto-Cascade

Manage blocking relationships and automatic date cascading

Reorder & Reparent Tasks

Use drag and drop to restructure your task hierarchy