I'm trying to find some sort of general benchmark for $ value of output per worker in civil construction activities. For example, if a company has total revenue from construction works of $x per annum, then how many employees should they have as a rule of thumb?
Looking at financial reports of major companies has thus far proved to be frustrating, since their use of sub-contractors makes it impossible to gain useful info by simply comparing the company's total revenue versus number of actual employees without knowing how much of the actual work was done by sub-contractors.
I understand that the varying cost of materials makes this a difficult thing to assess, but I'm just looking to get some sort of "feel" for what's reasonable as a measure of worker productivity.
Is there a "rule of thumb" which says that a construction project worth $10 million will take so many hours of labour or something like that?
Anyone know how much the cost of building something like a road, or the NBN, would be for actual labour?