There are main components of Project plan as below:
3. User Story
Milestone is the Significant stage of the project where we can achieve the objective within a particular deadline.
The minimum duration of the Milestone is 1 month depending on the complexity of project.
The minimum duration of the module is 5-15 working days.
A task is an activity where we can execute & complete within a particular time.
The task duration is 8-16 hours
Subtask is an activity that is associated with that particular task in which he belongs.
The duration of the subtask is 2-8 hours maximum.
5. User Story
The story is the user scenario of the application where the user can define some activities.
The user story will include multiple tasks which will be covered in 8-24 hours of duration.