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New subscriber and I love it, although it appears primarily commercial construction? I am in the homebuilding world but it appears so many of the issues are the same. There have not been good studies of rework in new home construction and I am in the process of putting together one with a strong University construction program. One thing I have studied a great deal and have nearly 5,000 data point on is "Wasted (or what should have been unnecessary) Trip Cost." We know that averages close to $15K per house very conservatively, and all-in including builder overhead and indirect is more like $20K. With construction hard cost averaging around $200K per unit these days (on a $400K home) that is 10%, So my question is, does your 9% number include the cost of extra trips to sites to do this work? I realize that on large commercial sites, many of the trades are there most days so on the surface it is not as big a deal, but since rework delays completion, by definition there are more trips. Please advise!

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