Nearly every construction activity is dependent upon some previous activity being done correctly.
For example, the installation of steel hold-downs for structural wood posts depends upon the anchor bolts being correctly placed in the concrete foundation or the concrete floor slab.
Adequate clearance space for door casing to fit inside a coat closet or in a narrow hallway…depends on the rough door openings being laid-out and framed correctly…starting with enough dimensional space given on the architectural plans.
Wood beams in the floor cannot be designed in the structural plans directly underneath the location of a bathroom toilet shown on the architectural plans.
Roof rafters and ceiling joists must be laid-out and framed so that ceiling flush lights…can lights…can be centered typically above bathroom sinks.
Thousands of other small details must be correctly implemented early in the construction in anticipation for activities that come much later in the construction.
Because the construction is divided up among so many different subcontractors and specialized building trades…the only person in a position to integrate all the pieces is the jobsite superintendent.
When the anchor bolts are slightly off correct layout…or placed too high or too low…or do not have all of the concrete wire-brushed off the anchor bolt threads…the concrete subcontractor may no longer be on the jobsite to hear the framing subcontractor complain about it…and might not be aware of these mistakes.
In some other cases…the framer may not personally like the electrician and does not care whether the electrician must chop out a quarter-inch on the side of a ceiling joist if it is in the way of centering a ceiling flush light.
For these and countless other similar reasons…the jobsite superintendent needs all the help better building plans can offer.