We present a weighted sum model to calculate the risk index, which is equivalent to a priority index for the replacement of pipes in a network. This index is based on two factors related to pipe condition (probability of failure and supply pipe leakage flow), and three factors related to the consequences of pipe failure (non-served demand for supply pipes, maximum evacuation flow for sewer pipes, and pipe relevance). The procedure encompasses both the supply and sewer networks, to avoid the need for ex-ante budget allocations. We tested different configurations for the risk index function terms, and calculated the associated weights by means of a discrete choice experiment. We applied the procedure to a large water company in Spain, where the results were fully accepted as an equilibrium representation of the renovation opinions of its technical staff.

我们提出了一个加权和模型来计算风险指数，该指数等于替换网络中管道的优先级指数。该指数基于与管道状况有关的两个因素（故障的可能性和供水管道泄漏流量），以及与管道故障的后果有关的三个因素（供水管道的未满足需求，下水道管道的最大疏散流量和管道）。关联）。该程序包括供应和下水道网络，以避免事前预算分配的需要。我们测试了风险指数函数项的不同配置，并通过离散选择实验计算了相关的权重。我们将该程序应用于西班牙一家大型自来水公司，