Vulnerability Scanning Methodologies Applied to Logistics Transportation Network
倩倩 杜 · Institutional Repositories DataBase (IRDB) · 2015
Logistics activities play one of the most important roles in society, especially economically.Transport is a fundamental part of logistics activities, which services a set of facilities in a logistics system.A reliable and efficient connection between each element of a logistics system is becoming increasingly important.However, transportation infrastructure networks are susceptible to threats from either human interference or natural disaster."Threats" may be cyclical disruptions such as daily congestion and maintenance activities, or unexpected events such as traffic accidents, structural breakdowns, natural hazards, or even more rare events like terrorist attacks, to mention a few.Under these threats that may cause a logistics facilities failing or degrading severely, reliability and efficiency are difficult to be guaranteed in logistics transportation networks consisting of thousands of links and nodes and complex transit systems.The vulnerability of transportation networks under unexpected threats has been the subject of growing attention in recent years.However, network vulnerability assessment has been focused on passenger transport mode.Logistics transportation networks have not yet been treated as specific subjects even though their definitions of trip failure and degradation are different from passenger transport.What matters most for the logistics case is different from the passenger case.In freight transportation networks, the best case is similar to passenger transport networks, but trip failure is not limited to when there is no route between origin and destination.The objective of logistics transport is to get the right materials to the right place at the right time while optimizing the total operational costs of this process.Some detour or increase in cost may cause the product to be damaged or have excessive cost resulting in selling failure, which also means the logistics transport fails.Logistics transportation networks are more sensitive to time and cost compared to passenger transport.The methodology used to assess vulnerability of logistics transportation networks should be developed in a different way to passenger or other transport mode.This study attempts to find a methodology to properly address the character of logistics transportation network vulnerability.In order to evaluate the performance of logistics transportation networks, time value is included in the generalized cost of logistics transportation.The generalized cost of logistics transport network is proposed considering both time value and transport cost.From