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ROI CalculatorA Functional Risk Assessment is a predictive technique for safety management that seeks to analyze potential modes of failure, quantify the consequences thereof, and implement effective controls in order to ensure the continued integrity of systems, including particular machines, software applications, or processes.
The modern industrial landscape depends heavily on the interaction between automated devices, cloud communications, and a complex range of human activities. The world now is driven by fast-moving operations, and waiting for a component breakdown or a cyberattack to happen before taking protective action is simply too risky and too expensive.
The Functional Risk Assessment is an engineering technique for anticipating how a system can be expected to fail, and to what degree, what impact the failure would have on human lives, data integrity, or the quality of the product being made, and what safeguards must be engineered into the system beforehand.
The overall purpose of the Functional Risk Assessment technique lies in understanding how a system could fail, the nature and extent of the risks posed by failure to safety, data, or manufacturing processes, and what preventive design measures should be put into place to protect against the risks identified.
This methodology allows companies to reconcile very high optimization goals with thorough risk reduction techniques. It is crucial for many specific safety requirements, including ISO 12100 (Machinery Safety), ISO 14971 (Medical Device Risk Management), and IEC 61508 (Functional Safety of Electronic Systems).
To ensure that a risk assessment remains entirely objective and empirical, risk analysis teams rely on standardized scoring systems built around three primary dimensions:
Severity (S): The indicator used to assess the extent of maximum damage that might result from failure mode in the worst-case scenario. It includes everything from minimal effects, such as cosmetic document errors, to extremely serious situations, such as system destruction, extreme pollution, and loss of life.
Occurrence/Probability (O): This is an estimation of how likely it is that the particular failure will occur within the regular operational period of the equipment/system process. Probability assessment uses historical statistics of product performance, vendor reliability, and stress testing.
Detectability (D): Technical estimate of the ability of the firm's monitoring capabilities to detect the presence of the fault prior to any adverse impact being felt by the consumer. High detectability implies automatic detection of the variances immediately, while low detectability implies that the fault cannot be detected until a system failure occurs.
When multiplied by each other (SxOxD), the values of these three parameters give a Risk Priority Number (RPN) figure. This RPN number acts as a benchmark, allowing the engineering team to direct their efforts towards addressing the most threatening hazards.
The Functional Risk Assessment is not just a piece of paper that companies write for the sake of auditing purposes and keeping it safely filed in a binder. The Functional Risk Assessment acts as a living piece of documentation that is continually referred back to and updated throughout the lifetime of the operating equipment. If there is ever a time when the risk team determines there is an extremely high RPN, the functional risk assessment requires that the company immediately use the hierarchy of control, which involves changing the engineering controls before any type of administrative control, such as signage or employee training logs.
When any sort of engineering changes have occurred, or a new failure mode becomes known through a root cause analysis, then the Functional Risk Assessment needs to be updated.
