Reliability is a fundamental characteristic of all systems, which if not thought about and managed throughout the life cycle will either:

  • (If set too high) result in over complex and expensive systems
  • (If set too low) result in systems which fail to meet the users needs

For simple items (and historically for complex systems) the method of developing “reliable systems” is to build prototypes, subject them to some sort of testing, identify weak areas and fix, repeating the process until the item is considered to be reliable enough. For complex systems this is both expensive and results in last minute surprises as problems are expected.

To over come this issue the concept of a Reliability case (since expanded to the dependability case) has been developed and applied to complex systems.

This presentation will explain the history of the dependability case, the concept and lessons learnt.

SARSW  in conjuction with CQI Gloucester will be holding a presentation by Richard Denning  on the History of the Dependability Case commencing at 19:00 on Wednesday 18th March 2020 at the Whitminster Inn, Whitminster, Gloucester. SaRS members and non-members are all welcome to attend this free event. Please note we have revised our booking procedures for attendance and you should now register your attendance through the new Eventbrite page found at the following link:

Note: Tickets do not need to be printed. If there are no non-member tickets available then please book using the CQI member ticket allocation


Wednesday, 18th March 2020 at 7:00pm


Wednesday, 18th March 2020 at 9:00pm


Whitminster Inn, Whitminster, Gloucester, GL2 7NY