[NEW] Project: Create a new page about task dependencies

content/applications/services/project/tasks.rst

@@ -11,3 +11,4 @@ Task management
    tasks/task_creation
    tasks/recurring_tasks
    tasks/sub-tasks
+   tasks/task_dependencies

content/applications/services/project/tasks/task_dependencies.rst

@@ -0,0 +1,52 @@
+=================
+Task dependencies
+=================
+
+Odoo Project allows you to split your projects into tasks and assign priorities among them. The
+relationships established between tasks ensure that specific tasks cannot start until others are
+completed.
+
+Configuration
+=============
+
+To enable task dependencies in Projects, go to :menuselection:`Project --> Configuration -->
+Settings`, enable :guilabel:`Task Dependencies`, and Click the :icon:`fa-cloud-upload`
+(:guilabel:`save`) icon.
+
+Set task dependencies
+=====================
+
+- In a project, open a task.
+- Click the :guilabel:`Blocked by` tab.
+- Click :guilabel:`Add a line`, and check the box for the tasks that need to be completed before
+  this task can start.
+
+.. note::
+   - **Predecessor**: The task that is blocking another task.
+   - **Successor**: The task that is blocked by another task.
+
+Odoo automatically manages task progress based on their dependency: the status of a successor cannot
+be changed to **In Progress** until its predecessor status is marked as **Approved**, **Cancelled**,
+or **Done**. The predecessor displays a **Blocked Tasks** Smart Button and the status of a successor
+is set to **Waiting**.
+
+Task dependencies in gantt view
+===============================
+
+The Gantt view allows you to visualize how tasks are related on a timeline grid. To enter Gantt
+view, go to your project and click the :icon:`fa-tasks` (:guilabel:`gantt view`) icon at the top
+right of the screen.
+
+Create a dependency in gantt view by hovering your mouse over a task. Click and drag one of the dots
+that appear, then drop it onto another task. The task at the start of the arrow is the predecessor
+and the one at the end of the arrow is the successor.
+
+.. image:: task_dependencies/task-dependency.png
+   :alt: Task dependency
+
+Remove dependencies
+===================
+
+- From the task form: go to the **Blocked by** tab and click the :icon:`fa-times` button.
+- From Gantt view: click the red :guilabel:`X` button that appears at the center of the arrow when
+  you hover your mouse over it.