Re: [Planner] Resource dependencies

[Xavier Ordoquy <xordoquy wanadoo fr>]

Richard Hult sloffed:
> There are a few subtasks:
> 
> 1. Figure out how to display the dependency visually.
> 
> 2. Implement the visual part (planner/src/planner-gantt-row.c and
> planner-relation-arrow.c mostly).
> 
> 3. Come up with a good algorithm for leveling the resource load.
> 
> 4. Add the dependency (called relation in the code) type everywhere that
> dependencies are handled.
> 
> 5. Implement the algorithm (mainly
> planner/libplanner/mrp-task-manager.c).
> 
> If people think that this is a good idea to do, I think 1 and 3 are good
> starting points.

Well, again I'm not sure this is that easy. Let me take the example with
two tasks for which of the two resources only one resource can work on
both. It points that a resource commitement in a task can change against
the time. This implies far more than it just sounds. Even if someone sets
the balance between the 2 tasks for the resource.

Task 1: ==================== (Resource 1, Resource 2)
Task 2: ===== (Resource 1)
             ^ (1)

(1) Resource 1 has finished task 2 on which he was working full time. He
now ca work on task 1 at 100%. Gantt chart will have to make the distinction
of before and after for computing its length in time (not in worked time).

Tasks 2 lasts 5 and Task 1 35 days.
Tasks one will take 20 (5+15) full days of resources 2 and 15 for Resource 1
Therefore Tasks 1 length will be 20 days.

Implementing this means a lot of changes in the way resources and tasks are
linked. Just warning to make things clear.

Regards,
Xavier Ordoquy.