Tube lines´ approach to integrated risk management under the PPP contract

The public private partnership (PPP) contract was put in place to manage and upgrade the infrastructure of the London underground network in addition to recovering the backlog from years of underinvestment. Tube lines, as the company responsible for the Jubilee, Northern & Piccadilly Lines, have developed an innovative approach to modelling safety risks as part of our overall asset management plan. This paper describes the reasons for the approach along with the development and use within the company.