Can be supplemented by the following methods (referring to the stage of completion of the project):
1, in the construction site under the witness of the tripartite (construction, supervision, construction) by the operation of the workers in accordance with the actual opening of the holes required for the amount of labor, materials, machinery consumption, records (hole depth, diameter, the number of people and materials required for the machine for the conversion);
2, estimating the price of an approximate tripartite Visa (construction, supervision, construction).
Budget stage, in the case of guaranteeing that you will not lose money directly estimated.
We encountered similar cases in the actual work of no subheading can be set is the use of this approach.