Case reference
Dynamic Motion Management subsystem for an oncology system.
Challenge
Adding a Dynamic Motion Management subsystem to a radiation treatment simulator used in the medical industry in order to detect and take corrective action for collisions between the moving parts of the machine, the ceiling, the floor and/or the patient.
The subsystem needed to maintain the high-speed performance of the equipment whilst at the same time ensuring that the patient’s safety was never compromised.
Praxis developed the
software system and
safety case, designated as ‘safety-related’, using industry best-practice techniques and its own
Correctness by Construction method. A software partitioning strategy was devised in order to distinguish critical and non-critical functions and hence to save development and assurance costs. The required safety assurance of all functions was achieved by following the project’s Safety Plan, developed and managed under the auspices of the Praxis Safety Management System, and was fully compliant with FDA requirements.
Outcome
The subsystem was delivered and accepted by the OEM, approved by the regulatory authorities and is now in operational service for oncology.