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Digital models have many benefits for construction; for example, clash detection prior to approval, ability to confirm assembly sequencing, verification of as-built dimensions, and more. Customizing and preparing such models for project delivery takes a large amount of time and, unfortunately, cannot guarantee that the physical building or part can be built as modeled; a disconnect between design intent and constructability can often occur. One reason for this is that design team is unaware of certain details that are involved in fabricating and assembling building components; an understanding that craftsmen take for granted.
Jeffrey Collins (Thu,) studied this question.