|
Track 2 Session 8
2:40 to 3:50 p.m. Thursday
April 12, 2007
Impact of Testability and Logistics on
Rail System Availability and Maintenance Cost
In this presentation, we plan to
describe the experience of ALSTOM Transport Information Solutions
with issues of testability, maintenance strategy and logistics, on
both main lines (ERTMS) and mass transit applications.
High availability and low maintenance cost (or more generally low
life cycle cost) are key requirements in today's complex rail
systems, both in mass transit and main line applications. This is
especially true for signaling and train control systems. A usual
approach to achieving high availability is through redundancy.
However, a number of questions related to testability, maintenance
strategy and logistics arise. In this session, various maintenance
policies will be compared, using Markov and other models, and a
sensitivity analysis of system availability with respect to
technical and logistical factors will be presented. In particular,
using Markov models, the very high sensitivity of availability to
failure detection probability will be demonstrated.
Key Words: Testability,
Maintenance, Logistics, Availability, Life Cycle Cost
|
