露天矿的基建开支很大,投资者所作的最终拨款决定,必须建立在费用估算误差比预期的收益率小得多的基础上。估算矿山基建费要从基建进度计划着手。该进度计划指出哪些工作该由承包商来做,哪些工作可由矿山的设备和人员来自营。 Open-pit mines have a large capital expenditure and the final appropriation decision made by investors must be based on a much smaller estimate of cost than the expected rate of return. Estimated mining infrastructure costs to proceed from the infrastructure progress plan. The schedule indicates what work should be done by the contractor and what work can be done by mine equipment and personnel.