Usually, the constraints are divided into two groups: Hard and Soft constraints. The difference between these two groups is about respecting the relationship logic.
Hard constraints overrides the relationship logic that is inserted by project scheduler and they will be not re-scheduled according the logic that exists in the project plan.
The following constraints are considered as Soft Constraints:
- As Late As Possible
- Start On
- Start On or Before
- Start On or After
- Finish On
- Finish On or Before
- Finish On or After
While the Hard Constraints are identified as:
- Mandatory Start
- Mandatory Finish
The Constraint Metrics graphical report may give answers to the project managers to why the project plan is scheduled as it is and why some activities do not respects the scheduling rules. The look of the Constraint Types report is presented on the image below.
To generate the predefined Activity Metrics Report for your project, select the Reports View, and choose Constraint Types Report from the DCMA 14 group of Reports.