How to do a good job of preliminary design estimates

Of course, not every region has a budget estimate quota, many regions have not prepared a budget estimate quota, such a situation can be done with the help of the budget quota, or with the national unified budget estimate quota to do. In doing the cost, must not be too dead, a lot of things are not in the quota, which requires flexibility. Sometimes you can do without the quota, according to the cost of equipment and materials, multiplied by the installation, construction, commissioning costs of the coefficient, and then multiplied by a variety of costing coefficients, and sometimes you can do so.