Technical Assurance and Integration

Crossrail poses significant challenges when it comes to integrating the various systems that make up the end-to-end railway, and the organisations responsible for delivering them, due to the complex nature of the scheme. These challenges include connecting a new metro central service with suburban rail services on the Great Western and Great Eastern surface routes, seamless operation across three different signalling systems, and managing the scale of the project with stations, tunnels, systems and rolling stock in my multiple contracts, delivered by many different parties, necessitating meticulous interface management.

The Technical Assurance and Integration team was set up to manage an integration approach on the overall (collective) performance of the railway organised around the “4 pillars”; Collectively Safe; Collectively Operable; Collectively Maintainable; Collectively Performs. This topic area includes papers that describe the railway integration approach at Crossrail, how interfaces were managed, and how the requirements were assured throughout design, build, and testing and commissioning.

TECHNICAL ASSURANCE AND INTEGRATION DOCUMENTS:

Summary Publication date Document Type
Managing Reliability Growth in Practice

Managing Reliability Growth in Practice

Topic area: Technical Assurance and Integration

Delivering the Elizabeth Line service that customers value and choose to travel on requires a network that is fully integrated, reliable, safe, and sustainable. To make Elizabeth Line the transport mode of choice, the network needs reliable systems and assets that deliver levels of performance consistent with a highly ...

02/12/2021 Technical Paper
System Integration EMI Issues in Large Complex Installations – A Case Study

System Integration EMI Issues in Large Complex Installations – A Case Study

Topic area: Technical Assurance and Integration

Achieving Electromagnetic Compatibility (EMC) between systems on a large complex project such as Crossrail can be challenging especially where different contractors are involved. Individual contractor tend to focus only on their scope of works and Electromagnetic Interference (EMI) between different systems can only be...

02/12/2021 Technical Paper
Crossrail Systems Integration – Lessons Learned and Good Practice in Managing Interdisciplinary Systems Integration through each Stage of the Crossrail Programme

Crossrail Systems Integration – Lessons Learned and Good Practice in Managing Interdisciplinary Systems Integration through each Stage of the Crossrail Programme

Topic area: Technical Assurance and Integration

This paper sets out the main observations and lessons learnt about the integration of many different systems and the interdisciplinary coordination activities as taken from the Chief Engineers Group experience of the Crossrail Programme and highlights a strategy for Systems Integration that could be applied on other Me...

02/12/2021 Technical Paper
Transitioning of the engineering management in the handover phase of programme delivery

Transitioning of the engineering management in the handover phase of programme delivery

Topic area: Technical Assurance and Integration

The Engineering Management Office (EMO) function provides an important link between the client’s specifier of requirements and its contracting arm delivering the works. The longevity, scale and geographical fragmentation often necessitate a phased completion approach in delivery of major infrastructure programmes. Ne...

02/12/2021 Technical Paper
Photo of a Class 345 train at Paddington Station

The Role of Rolling Stock Approval and Assurance within Major Railway Programmes

Topic area: Technical Assurance and Integration

In the UK, the rail industry must comply with the requirements of the Railway and Other Guided Transport Systems (Safety) Regulations which sits alongside the European Interoperability Directive 2008/57/EC. New or modified trains cannot be operated unless the Office of Rail and Road has issued an Authorisation for the ...

02/12/2021 Technical Paper
RAM in an Interconnected World

RAM in an Interconnected World

Topic area: Technical Assurance and Integration

Sustainability and Reliability, Availability and Maintainability (RAM) are two different means to the same end: conservation of resources. In the case of sustainability, these resources typically relate to environmental, economic, and social outcomes, whereas in RAM it relates to the design optimisation of systems. The...

02/12/2021 Technical Paper
Final Design Overview – A Crossrail Design Assurance Process

Final Design Overview – A Crossrail Design Assurance Process

Topic area: Technical Assurance and Integration

Assurance is defined as all the systematic actions necessary to provide confidence that the target deliverables have been met. Assuring the Crossrail design proved extremely challenging due to the complexity and scale of the system and, with the designs being delivered via a significant number of different contracts, d...

24/11/2021 Technical Paper
The Railway Integration Approach at Crossrail

The Railway Integration Approach at Crossrail

Topic area: Technical Assurance and Integration

Crossrail poses significant integration challenges due to the complex nature of the scheme. This document provides an overview of the approach employed at Crossrail to define the various dimensions of “Railway Integration” and a high level summary of the processes and techniques used to manage them. It will be usef...

02/08/2018 Technical Paper
Client Advice and Technical Services to Chief Engineer’s Group

Client Advice and Technical Services to Chief Engineer’s Group

Topic area: Technical Assurance and Integration

Between early 2013 and 2018, CEG worked with Crossrail’s programme delivery function and station contractors on station design development and progressive acceptance that requirements were met. In addition, they led the performance verification programme for C100 designs. C100 provided support in both areas of work a...

09/07/2018 Technical Paper
Effective Reliability, Availability, Maintainability (RAM) and Safety (S), Principles and Guidelines for Large Subsurface Metro and Main Line Projects

Effective Reliability, Availability, Maintainability (RAM) and Safety (S), Principles and Guidelines for Large Subsurface Metro and Main Line Projects

Topic area: Technical Assurance and Integration

This paper offers support and guidance on a major infrastructure subsurface railway project, to select and undertake an effective reliability, availability and maintainability and safety (RAMS) strategy. RAMS which forms part of systems engineering is an essential discipline and integrated in most railway undertakings....

09/07/2018 Technical Paper
Integration, Testing and Commissioning at Crossrail

Integration, Testing and Commissioning at Crossrail

Topic area: Technical Assurance and Integration

Crossrail’s Central Operating Section is characterised by high performance requirements of a metro system with high specified train service throughput. This is realised via multiple interdependent electronic systems which control the movement of trains together with station systems, traction and auxiliary power suppl...

09/07/2018 Technical Paper
Maintenance and Cost Analysis on Major Subsurface Rail Projects – Crossrail

Maintenance and Cost Analysis on Major Subsurface Rail Projects – Crossrail

Topic area: Technical Assurance and Integration

The purpose of this case paper is to highlight the maintenance and cost analysis principles on a mega subsurface metro railway project. The paper identifies how crossrail delivered the maintenance through the project life cycle. Its objectives are also to illustrate some of the technical and programme challenges on the...

09/07/2018 Technical Paper
Integration tests for Crossrail Station Services

Integration tests for Crossrail Station Services

Topic area: Technical Assurance and Integration

This paper describes the integration tests implemented for Crossrail Station Services. It describes a set of Test Scenarios, which enable through their completion to provide a consistent and effective schema, to ensure Crossrail works in an integrated manner. The scenarios were design to test the systems under numerous...

09/07/2018 Technical Paper
Interface Management Procedure

Interface Management Procedure

Topic area: Technical Assurance and Integration

This procedure addressed interface management undertaken on the design and engineering of the Crossrail Central Section. It applied to all the systems, sub-systems, components and interfaces that made up the Crossrail Central Section, including all civil, and infrastructure elements plus interfaces to those elements lo...

09/07/2018 Good Practice Document
Systems Architecture Models in Crossrail Design and Delivery – Client’s perspective

Systems Architecture Models in Crossrail Design and Delivery – Client’s perspective

Topic area: Technical Assurance and Integration

The architecture of a system can be expressed in conceptual models that represent a system of interest in its environment. It can be framed and described in different views for the perspective of specific system concerns. A system architecture diagram in turn is often used as a work product to communicate these views....

30/09/2017 Technical Paper
A Systems Approach to Infrastructure Delivery – Part 2: Putting the principles into practice

A Systems Approach to Infrastructure Delivery – Part 2: Putting the principles into practice

Topic area: Delivery/execution strategy

The second report from ICE’s Systems Approach to Infrastructure Delivery review shows how infrastructure projects, programmes, and supply chain businesses are using systems thinking to deliver better outcomes. In December 2020, ICE published the findings of a major review into improving the delivery of major infrastr...

20/04/2022 Case Study
Photo of train driving simulator in use

Crossrail Integration Facility and Test Automation

Topic area: Rail systems

Systems integration has gained a higher level of importance as complex railway projects operate under tighter schedules than ever before and with limited access to tracks to run tests. This paper demonstrates how a fully automated off-site testing facility is extremely valuable to increase efficiency, cost-effectivenes...

02/10/2020 Journal Publication
Compliance of Technical Assurance Requirements for MEP Installations at Crossrail Stations, Shafts and Portals

Compliance of Technical Assurance Requirements for MEP Installations at Crossrail Stations, Shafts and Portals

Topic area: Mechanical, Electrical & Public Health

This paper highlights the approach adopted by Crossrail to demonstrate compliance with technical assurance requirements for MEP installations at stations, shafts and portals. The common approach has taken into consideration the diverse nature of design and complexity of installation at different work sites. The documen...

30/09/2017 Technical Paper