The method Microsoft Project uses to calculate Task Cost results in an inaccurate task cost value in the project during the update or transfer:

  • One or more new resource assignments.
  • Task Estimated Cost to Task Cost.

To prevent this inaccuracy, transfer new resources and cost mapping for a task in separate updates. If you have already transferred cost mapping and new resources for a task in a single update, re-transfer the project from Web TimeSheet to Microsoft Project using the same mapping to correct the data in accuracy.