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Through Life Safety (TLSA)

Course details

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This course addresses the safety issues that arise after system deployment. It aims to:

  • safe management of operational systems;
  • procedures required to maintain the safety of systems when maintenance or modification is required;
  • safety monitoring and advanced safety monitoring.

By the end of the course, you will be able to:

  • compare equipment and operational safety cases;
  • describe the relationship between equipment and operational safety cases;
  • review operational procedures for safety implications;
  • describe and participate in processes for the maintenance of ALARP in operation;
  • plan data collection using information from the design safety case;
  • describe the role and different levels of health monitoring in operational safety;
  • describe and participate in analysis of operational data for safety;
  • identifying and discuss issues relating to multiple organisations interacting in a safety programme;
  • describe and participate in the application of the principles of obsolescence and change management;
  • describe and participate in the application of techniques for accident modelling;
  • critically compare techniques for accident modelling;
  • explain the role of emergency planning in through life safety;
  • discuss the state of the art and future directions in Through Life Safety.

Who is the course for?

This course is suitable for:

  • practitioners across all domains including aerospace, military, railway, automotive, civil nuclear, civil maritime, medical devices, healthcare, and so on;
  • developers of equipment safety cases during design for software, hardware, procedures, systems and/or platforms;
  • developers of safety cases for operational safety and disposal
  • reviewers of safety cases within an organisation or as an independent activity;
  • developers and reviewers of changes to existing safety-critical / safety-related equipment and operations;
  • project managers where development of a safety case is a significant element of projects they manage;
  • regulators of safety critical domains.


A basic understanding of system safety terminology via prior learning or industrial experience. It is useful for you to have taken our Foundations of System Safety Engineering course, but if you have not, please email us with your details so we can assess your suitability for taking this course.

How is the course taught?

The course takes place over one week at the University of York. This week consists of a mixture of lectures and practicals, but we expect you to put in around 30 hours of private study.

Over the week, there will be a series of lectures and a number of case studies. The case studies give you the chance to work through an example to reinforce your learning from the lectures. This is also a chance to gain other insights from the experience and knowledge of other delegates. You will also be able to call on the experience and knowledge of our specialised teaching staff during these sessions.  

The module ends with an assessed exercise, which you have the option of completing. It takes approximately 35 hours in addition to the scheduled teaching time and can be completed on or off site. All assessed exercises are open (so you won't take an exam in supervised conditions), and comprise a report, case study, or documented piece of software.

If you choose to take and pass your assessment, your results can count towards the completion of the MSc in Safety Critical Systems Engineering. Our MSc in Safety Critical Systems Engineering is an accredited course, recognised by both the BCS, the Chartered Institute for IT and the Institution of Engineering and Technology (IET) for the purposes of partial fulfilment of the educational requirement for CEng registration.

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Find out more about what this professional accreditation means.

Recommended reading

Barry Turner The Organizational and Interorganisational Development of Disasters Administrative Science Quarterly 1976
Sidney Dekker Just Cluture Ashgate 2007
Charles Perrow The Next Catastrophe Princeton 2007
Diane Vaughan Challenger Launch Decision Chicago 1996
Leveson, Nancy, et al Applying STAMP in accident analysis Nasa Conference Publication, NASA 2003





Book your place

Book your place

The next TLSA instance will be taking place w/c 1st March 2021.

Before booking, please read our Booking Conditions (PDF , 104kb).

To book your place, please complete the booking form and payment form below and return to our Student & Academic Administration Team. Payment can be made online via credit/debit card

CPD Booking Form 2020/21 (MS Word , 70kb)

CPD Payment Form 2020-21 (MS Word , 65kb)

If you have any queries, please contact Heather Taylor, our course administrator, or call 01904 325536.

Image of Through Life Saftey teaching

One of the best courses I have been on.  Have gained a good appreciation of system safety and in particular the analysis techniques involved.