Particularly when it comes to defining lots and locations where Earthworks and concrete pours occur, these are always subject to change due to weather events or other delays. For example we may have a lot (location) calibrated on the drawing for 100m of trench excavation, but due to weather or other contractor actions, may only be able to complete 30m of that in a day, and perhaps 60m the next day and 10m the following day. As a result, it would be extremely useful, if we could add these sub-lots manually to the next tier of geometry in that original 100m lot. that way we can assign the QA verification to each of those sub-lots and demonstrate to the client easily the timeline of the works and sequence of construction. It also helps on a day to day basis when generating Earned Value progress.