The safety of software is becoming progressively important in computer controlled systems on which human life depends. In many cases software perform a main role in the safety-critical systems. There are many well known examples in application areas such as medical devices, aircraft flight control, weapons, and nuclear systems. In the field of medical sciences, innovative implantable medical devices are increasingly managed by software. In the medical domain, cochlear implant system (CIS) for bionic ear is one of the safety-critical medical devices which is controlled through clinical programming soft-ware (CPS). This paper examines the nature of software related failures of medical devices and applied this analysis to CPS of CIS as Medical Cyber-Physical System (MCPS) of bionic ear and performs the hazard identification, hazard analysis, safety design. The process begins with different types of hazard analysis techniques to CPS such as: FMEA, FTA, PHA, ETA, and FC. All the techniques are applied and then a comparison is made among them and results are explained.
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