A task with an inflexible constraint can cause a number of problems. Predecessor tasks might not finish before a constrained task starts. Resources might become overloaded with work. You can be informed of these conflicts by using the Microsoft Project PlanningWizard.
If the PlanningWizard is turned on, it displays a message each time you set a constraint that causes or might cause a scheduling conflict. The message describes the conflict and provides a list of several options, from canceling the constraint to setting the constraint and continuing on. Choose the option that’s appropriate to your situation.
The PlanningWizard can help prevent you from getting entangled in messy scheduling conflicts. If you have inflexible constraints in your schedule, be sure you turn on the PlanningWizard.
If the PlanningWizard is not on, you will not see the PlanningWizard but you may see an alert message.
To turn on the PlanningWizard