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Licensing for Next Generation Signalling

Buddhadev Dutta Chowdhury

27th April 2012

Competence and Competency

Competency needs to respond to:- Organisational Changes- Emerging Technologies- Change in Project Lifecycle- Change in Operation and

Maintenance RegimeCompetency Models

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IRSE Licence

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IRSE Licensing- Competency benchmarking across the supply chain- Based on International Standard for Personal Certification ISO 17024- Covers a wide range: Design, Installation, Testing, Project Engineering and Technical- Is this adequate for future trends on signalling?- We may have to adapt some competency frameworks.

Signalling Evolution

Mechanical Interlocking Electro-Mechanical Systems Relay Interlocking Solid State Interlocking Computer Based Interlocking Communication Based Train Control

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Change in contractual Arrangements

Previous signalling contracts specified products- Client owned the system New contracts do not specify technical requirements. Instead

they require performance-related criteria, such as: - Journey Time Capability- Reliability- Whole lifecycle cost- Clients endorse the system- Supplier owns the design of the system

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Complexity of Systems

Combined effort to achieve performance Performance requirements apportionment Knowledge and understanding of all the key disciplines:

- Signalling- Telecommunications- Rolling Stock- Control System- Traction- Traffic Control

Simulation techniques

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Train Control System Architecture Interface

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Train-borne signalling

Design competency Testing Competency Maintenance Competency- First Line Maintenance- Second Line Maintenance- Third Line Maintenance

Rolling stock and Signalling systems integration are increasing in complexity.

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Signalling systems (hardware & Software)

Moving towards common hardware platform. Software modifications to fulfil contract

requirements are the main areas of change for new projects.

Data modifications and preparation are required depending on the geographical layouts and constraints of the railway.

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Software Development Lifecycle

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Software Reliability

Assess qualitative failures Dependent on robustness Failure Rates:

- Capability Maturity Model- Number of Lines of Code- Environmental Parameters- Decrease through Testing Process

DRACAS Data Management

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Data Preparation

Systems configured by data Significant testing in factory prior to being released

on site This is either software or data or a combination of

both Common hardware platform with digital/serial/radio

I/O Geographical data/map on trains or wayside No traditional relay interlocking

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Embedded Software & SIL Levels

Embedded software- Extra complexity- Extra functionality Safety Integrity level- Rolling Stock - Signalling

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Communication Knowledge and Understanding

Transmission theory Security +

robustness + coding + signal processing

Network architecture Interfaces, EMC

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Voice Operation Comms

Distributed mobile / fixed comms Routing Talk groups Network architecture Coding – real time Signal processing

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Tools

Computer for software interfaces Radio testing platforms Antenna Bespoke preparation tools based on the suppliers products. V&V tools System integration platforms (simulators/ emulators) Compliers (with high integrity levels)

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Systems approach

Total railway approach is required. Data and software from non-signalling systems may

be critical. Interfaces are no longer only voltage free contacts

but complex data channels. Examples include:

Information to/from other train systems (TMS, ATO, Brake controllers / traction controllers)

Interfaces to/from other wayside systems (Comms, ATS systems, passenger information etc)

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Reliability Availability Maintainability

Fundamental Principle of RAM analysis Domain experience of signalling Adopt Systems Engineering approach Failure data apportioned to signalling

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Engineering Safety

Hazard identification, log and management Interface hazard analysis SIL assessment / Tolerable hazard rates

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Safety Case

Evidence of quality management Evidence of safety management Evidence of functional and technical safety

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Issues of Overview Specification

Communication with other discipline / stake holders

Visualisation of complete system Partitioning of the systems and

apportionment

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Complexity of Software adaptation

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Regulatory & Guidance Documents

Railway and Other guided Transport Systems (Safety) Regulations (ROGS)

Company standards- Network Rail standards- London Underground Standards ORR Guidance Regulations Yellow Book

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Competency Framework

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Subject Areas

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Further Break down

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What we need

Structured approach to competence management process

Knowledge and understanding of functionality, architecture and interfaces including impacts on the other systems.

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Conclusion

Through knowledge of total operation and engineering systems

Proven ability to the company business An understanding of rail industries Practical, commercial, financial management

awareness and ability A defined roots for professional development

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Thank You

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