lol wat project management dunno dun anyhow say

consultant design n set the specification n standards contractor build n install accourding to the design n specs set by the consultant

contractor which have own design team is called "design & build contractor"
its like contractor can propose any other alternative ways to make system works with better system, energy efficiency, double protection or maybe cost saving, engineering is much more bout finding alternative ways to do the way clients wants.
so, what consultant A said doesn't be what consultant B or maybe contractor C thinks and follows, we called it design preference in better words, its a win-win strategy.

hmm.. Out of Topic, dei..
no point complaining u are not born rich, no one can choose to have rich/poor family, its out of our control, how can u says such a judgment out of no where ? sad if ur parents saw what u wrote. no money to buy car?

this teach u a lesson, dont dig hole when shit is already on ur arse.

remember that,
no one can choose to born rich, but u can choose to die rich or die poor.