The notion of "Bow Tie Risk Management Methodology" might seem whimsical at first, given its whimsical-sounding name, but make no mistake - it is a serious, meticulous approach to ensuring thorough risk assessment and mitigation. Developed by Dr. David Hillson, also known as the "Risk Doctor," this methodology is an offshoot of the traditional bow tie model from the Health and Safety Executive (HSE) UK.
At its core, the Bow Tie Risk Management Methodology leverages the bow tie diagram, an intuitive and easily understood visual representation of risk. This method transpose risks from a linear sequence to a dynamic interplay of factors, offering a holistic view unparalleled by traditional risk management models.
Understanding the Bow Tie Model
The Bow Tie Model is a graphical depiction of a risk, resembling a, well, bow tie. It consists of three key components: the hazard, the top event (the tie), and the controls (the bow on either end).
The top event is the undesirable occurrence that we aim to prevent or mitigate. The likelihood of this event happening is influenced by the presence or absence of threat factors (the hazard) and risk barriers (controls). This creates the 'bow tie' shape, where the hazard factors sit on one side of the 'tie' (the top event), and the risk barriers sit on the other.
The Hazard Side of the Bow Tie
On the hazard side of the bow tie, the goal is to identify and address all potential risk factors that could contribute to the occurrence of the top event. These could be external sources, internal processes, or even human error.
For example, in the case of a potential data breach top event, hazards could include weak password policies (an internal process), unsupported software (an external source), or an employee clicking on a phishing link (human error).
The Barrier Side of the Bow Tie
The barrier side of the bow tie focuses on the preventive and mitigation controls in place to counteract these hazards. These could be physical security measures, procedural safeguards (like back-up protocols), or even employee training and awareness.
Continuing with the data breach example, preventive barriers might include encryption software, employee training on cybersecurity best practices, while mitigation barriers could include a data recovery plan and post-breach esclation protocols.
Implementing the Bow Tie Risk Management Methodology
Implementing the Bow Tie Risk Management Methodology involves five main steps. The first three are concerned with understanding and mapping out the risk, while the last two involve evaluating and mitigating it.
The first step, "Identify the Top Event," requires specifying the undesirable occurrence that would trigger a bow tie risk analysis. The second step, "Brainstorm Hazard Factors," involves listing all possible threats that could contribute to this event.following that, the third step, "Brainstorm Risk Barriers," identifies all existing preventive and mitigation controls.
Risk Evaluation
The fourth step, "Evaluate Risk," involves assessing the likelihood and potential severity of the top event, given the presence or absence of identified hazards and barriers. This step often involves numerical scoring and matrix analysis.
By mapping this out on a bow tie diagram, you can instantly visualize which hazards contribute most significantly to the risk and which barriers are most critical to its mitigation. This makes the subsequent risk management decision-making process much more straightforward.
Risk Mitigation
The fifth and final step, "Mitigate Risk," involves implementing the necessary actions identified in the preceding steps to reduce the risk to an acceptable level. This could involve creating new controls to address identified hazards, strengthening existing ones, or even eliminating hazards altogether.
Regular review and update of the bow tie model are essential to ensure its continued relevance and effectiveness. Threats and controls are ever-changing, and risk management strategies must evolve to keep pace.
In the dynamic and complex modern business world, risks are multifaceted and interconnected. The Bow Tie Risk Management Methodology provides a powerful tool for unraveling these complexities and managing them effectively. It offers a comprehensive, holistic approach that can be applied across all sectors, large and small, providing a roadmap to proactive, forward-thinking risk management.