หวยฮานอยวันที่ 28กค62ให้...08..เข้าบนตรงๆครับ
Whenever you become involved in a construction project, you first bid on it. To make a bid properly, it's helpful if you make an estimate first, so that you can come close to what it's actually going to entail before you place your bid and thus be sure to make a profit. If your construction estimate is accurate, it will involve all areas of expenditure, and will also give you a good idea of the time and materials required for the job. Your estimate must be drawn up correctly so that your actual costs are close to the estimated costs.
from: http://ezinearticles.com/?How-Accurate-Construction-Estimates-Can-Benefit-You&id=896007
