And, accordingly, we can ask contractor, why such figures in its contracting estimates, based on some calculations. This is regarding the choice of podryadchika.Vybrav contractor, and will control the document under which you will be working with him (Contractors estimates), you begin construction. Now with the help of investors' estimates, you can plan and control all (from large to small) stages of construction duration, cost, labor resources, consumption materiala.Esli you require contractors to do estimates on RESN, the investor estimates you need for planning funding, procurement it.d. If you admit that contractors do estimates without reference to RESN, then estimate investor you need just to check your podryadchikov.Davayte see whether the customer based on these rules, or you can rely on calculations without reference to rules RESN (also known as' the Urban rates'). Here, Viacom expresses very clear opinions on the subject. The estimated cost of the unit of work (1 m3 of earthworks, foundations 1 m3, 1 m3 of wall panels, etc.) is determined by compiling unit prices. Unit prices are compiled by the unit of work or designs, adopted in normah.Raschet estimated without reference to rules made by the contractor RESN enlarged, often with a "general numbers" (for m2, for all the work, etc.). What is (what works, what materials), and what duration of all the works of such a calculation is impossible to understand. It is impossible to estimate how much or how little the contractor asks whether all the work he has taken into account, will there be enough money for the contractor claimed the alleged operation.