Understanding the interactions between constraints and dependencies

Both constraints and dependencies drive the timing of a task. Consider for a moment how constraints and dependencies may interact when you apply one of each to a task. Say that you have a task — to open a new facility — that has a constraint set so that it must start on June 6. You then set up a dependency that indicates that the task should begin after a task — fire inspection — that is scheduled for completion on June 10. When you try to set up such a dependency, Project displays a Planning Wizard dialog box, as shown in Figure 4-19. This dialog box indicates a scheduling conflict. Project displays this dialog box when a conflict exists among dependencies or between constraints and dependencies.

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Planning Wizard ¿j

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Figure 4-19: Multiple dependencies or a combination of dependencies and constraints can cause conflicts in timing.

If a conflict exists between a constraint and a dependency, the constraint drives the timing of the task; the task does not move from the constraint-imposed date. You can modify this functionality by choosing ToolsOOptions. On the Schedule tab of the Options dialog box, remove the check mark from the Tasks will always honor their constraint dates check box. When you change this option, dependencies — rather than constraints — determine timing.

- Cross- See Chapter 9 for more information about resolving timing conflicts.

Reference

You can create dependencies in one of the following three ways:

♦ You can select two tasks and choose EditOLink Tasks or use the Link Tasks button on the Standard toolbar. The first task that you select becomes the predecessor in the relationship.

♦ You can open the successor task's Task Information dialog box and enter predecessor information on the Predecessors tab.

♦ You can use your mouse button to click the Gantt bar of a predecessor and drag it to the Gantt bar of a successor to create a link to a successor task.

Tip To link a whole range of tasks to be consecutive (one finishes, the next begins, and so on down through the list of tasks), select the range of tasks (drag from the ID * number of the first task to the ID of the last task). Then use the Link Tasks button or choose EditOLink Tasks to create a string of such relationships at one time.

Project Management Made Easy

Project Management Made Easy

What you need to know about… Project Management Made Easy! Project management consists of more than just a large building project and can encompass small projects as well. No matter what the size of your project, you need to have some sort of project management. How you manage your project has everything to do with its outcome.

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