Need to know about the standard rollup hours in the project item navigator. when you are updating labor run factor of a routing, How the standard rollup hours are changing. should the total standard rollup hours of the top part should be updated by the same number that changing in the labor run factor of the relevant routing.? How does this relate to the engineering part revision.? Should the total of the standard roll up of the component part s be equal to the standard rollup hours of the top part in the project item navigator. Is there any bug fix related to this?