You can create more than one ProjectPlanData for a Project . Each of this ProjectPlanData represents a project plan scenario for the project. ProjectPlanData includes beside project relevant metrics the Counts , ProjectEstimations , ProcessVersions , ProjectActualData , ProjectInterruptions and UnestimatedEfforts .
One of this ProjectPlanData has to be set as default. It means, that the default Project Plan Data is valid for the project. Only the default ProjectPlanData of the completed projects in Software Life Cycle Experience Database (SLED) are used for the calibration and other metrics reports.