Electrical installation engineering quantity calculation is a tedious work, but the quantity is the basis of a budget data, the calculation results are accurate or not, directly affect the accuracy of the final project cost, so the staff to give full attention to calculation of quantities link budget.

Practice affect the accuracy of the quantities basically has the following factors: the first is budget personnel professional level is not enough, the calculation of the detailed rules and electrical installation project budget quota are not familiar with the composition of the content, especially for not understanding electrical construction technology and process, calculation of quantities, often can appear more calculate, calculate, and so on and so forth.

Second is due to the preliminary engineering design depth is not enough, the late engineering design changes occur probability increase, if the budget personnel ? no timely and construction