TfL Ref: 1520-1920

Thank you for your request received by us on 20 August 2019 asking for information about tests carried out by the Crossrail Integration Facility.

Your request has been considered in accordance with the requirements of the Freedom of Information Act and our information access policy. I can confirm that we hold the information you require. You asked for:

details of the 106 test scenarios "capable of being tested" by Crossrail at it's Crossrail Integration Facility, as noted in the report to the London Assembly linked to below.

May the request include details of which tests passed, and which tests failed.

http://content.tfl.gov.uk/florence-eshalomi-monthly-update-august-2019.pdf

The Crossrail Integration Facility enables signalling software and data from the various suppliers to be integrated together, and tested prior to, or at the same time as being implemented onto the railway.

The outcome of testing conducted at the Crossrail Integration Facility provides a level of confidence of the functionality and behaviour of the software and provides the opportunity to undertake preliminary investigations where the integrated functionality or behaviour differs from expectation.

Tests which pass provide a high level of confidence that the software and data will behave and perform as expected during tests on the railway.

Tests which do not pass are subject to investigation, and causes can be for a large variety of reasons from errors in Test Books through to immature software and data.

Partial Passes are classified as where the primary function under test was successful, but an ancillary element did not pass.

The 106 tests referred to in Crossrail’s August update to the London Assembly Transport Committee represent a sub-set of the total signalling tests which will be conducted on the railway and at its boundaries. These are contained within a suite of test books, with the Crossrail Integration Facility assessed confidence results in the table below.

Tests classified as ‘Other’ in the table attached are those where the results in the Crossrail Integration Facility need to be considered in conjunction with the test results obtained on the railway.

If this is not the information you are looking for, or if you are unable to access it for any reason, please do not hesitate to contact me.

Please see the attached information sheet for details of your right to appeal as well as information on copyright and what to do if you would like to re-use any of the information we have disclosed.

Yours sincerely

Jasmine Howard
FOI Case Officer
Information Governance
Transport For London

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