1.1.4 SYSTEMS ENGINEERING OF RENEWALS AND EXTENSIONS IN MASS TRANSIT RAILWAYS
John Sibley Williams, Jeff Allan · INCOSE International Symposium · 1995
Abstract Rapid Transit Railways have become complex and expensive safety critical systems involving a considerable range of technologies and a wide choice of implementations. Many of the older systems have now reached a stage at which renewals and frequently, further extensions have become essential in order to cope with the increasingly difficult commercial and legislative environment of the present and future. These tasks are far from trivial and as a consequence, an approach based on systems engineering has been evolved to deal with them. This paper covers aspects of a code of practice which has been developed in the context of the major renewal and extension projects.