Progressive AssuranceUsing system engineering tools and techniques to support project managers

Simon D’Cruz

Head of Rail Systems and Projects

Synopsis

System Engineering Tools and Techniques can enable Project and Programme Managers

• Decomposition and Traceability

• Real-time Reporting

Stakeholder Management

• Complex Software Development

• Progressive Assurance

Progress Monitoring

• Impact on RequirementsChange

Delivering Railway Safety

Signalling has developed since the birth of rail nearly 200 years ago

Signalling systems have evolved with technology

Mechanical Locking

Relay Interlocking

Software Safety Systems

ERTMS – the European Rail Traffic Management System

December 1989: EC started investigations in S&T issues

June 1991 : Eurosig and UIC agreed on the principle

December 1993: TSI conceived

Summer 1998: UNSIG Formed of the key system suppliers

April 2000: ERTMS Specification Issued

Objective:

Provide interoperability across international boundaries

Standardisation through replacement of national ATP systems

Reduce whole life cycle costs

Increase network capacity, flexibility and capability

Deployment to Date

Over 80,000km worldwide and over 10,000 vehicles fitted

Worldwide deployment

In the UK

One trial site on the Cambrian Line

Projects underway on Thameslink and Crossrail

Future deployment being led by the Digital Rail team in Network Rail

Paper Driven?

Consider a modern infrastructure programme 5 yrs, USD 300M, Owner’s or General Contractor’s viewpoint

50,000 Document & drawing items

10,000 Formal letters

30,000 Test items

>1,000,000 files and other objects on shared servers

Thousands of other related lists and items such as change requests, punch items, permits, certificates, interface data etc.

A requirement life cycle

The Need: Passengers expect internet access during their journey

The Requirement: the train shall be fitted with wi-fi technology that can be accessed in parts of the carriage

The requirement lives in a document,

The requirement is then defined in design documents and drawings

The requirement is validated by a test item

The test item is based on requirements

The tested item is a piece of hardware

The hardware is running a version of software

Which belongs to a system configuration

Requirements on a Safety Critical Project

Source 6,000 Requirement

50 Safety Requirements

Preliminary Design

5000 Requirements

30 Safety Requirements

Detailed Design

13,000 Requirements

300 safety requirements

Final Handover

23,000 Requirements

400 Safety Requirements

Results

97%

6 Contractors

55 Changes

5,000 Req

Stakeholder Management / Requirement Management

Identify

Plan

Manage

Control Engagement

Capture

Decompose

Trace

Validate

How does Progressive Assurance help Project Managers?

Progressive Assurance

Config-uration

Design Review

Safety Assurance

Assumptions

Schedule

• Configuration Control version control, baselines and change control

• Online Design Reviews enabling full design life traceability

• Requirements Schedule planning

• Assumptions management

Streamlining the design governance

Planning for Progressive Assurance

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

PRELIMINA RY D ES IGN

FINA L D ES IGN MA NUFA CTURE INSTA LLA TION COMMISS IONING OPERA TION A ND MA INTENA NCE

PROGRESSIVE ASSURANCEPlanned

Actual

In Conclusion

System Engineering can provide the techniques to

Better stakeholder management

Progressive Assurance provides the Tool

Enables assurance through the project process and not just at the end

Real time management and reporting

Reduces reliance on design submissions

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