*5.1. Summary of Outcomes*

This work proposes a new methodology for integrating structured frameworks to the Bowtie method. Ishikawa's 6M approach was chosen to structure the Bowties and the accompanying brainstorming sessions. We showed that a contextualisation of the 6M categories was required for application to a maintenance environment. While constructing the Bowtie diagram, it was found that there is inconsistency and confusion about the hazard and top event relationship. A consistent interpretation was provided to overcome this problem. Furthermore, it was found that there are cascading consequences for different stakeholders. Depending on the focus of the risk analysis and the target audience, there are different consequences, which we demonstrated in this work. Moreover, the visualisation and receptivity of the diagram was improved by assigning different colours to each barrier category, which supports the main purpose of the Bowtie method, i.e., functioning as communication tool. Finally, the proposed conceptual framework was tested by applying it to the specific case of visual borescope inspection of aero engine parts.
