The interface consists of two pages, one showing active alarms and where they are coming from, and one showing the alarm history of the bridge. The operators can turn off alarms in the interface and have the option to mute them while keeping them active.
The Process
This was a group project conducted with two other students.
The main focus of this project was to analyze the human-machine system of the bridge to find potential areas of issue. For this, a wide range of methods were used such as:
System Model
A visualization of the bridges' human-machine system, the subsystems, and the surrounding socio-technical system.
Cybernetics System Model
The human-machine system of a bridge has many cybernetic aspects. The visualization of the system model is somewhat simplified to allow for better visualization. Some things, like for example the bow thruster, are not included in the model.
HTA (Hierarchical Task Analysis)
This HTA doesn’t cover all tasks the operator performs on the bridge, like the start-up of the bridge before departure. Instead, it focuses on navigation. Some tasks that sometimes are performed in parallel, such as radio communication, are omitted.
In addition to this, the following methods, principles, models, and theories were also applied:
• Use Cases
• User Profiles
• Nasa Task Load Index
• Wickens' Resource Model
• ACTA (Applied Cognitive Task Analysis)
• Hesselgrens Emotional Scale
• ECW (Enhanced Cognitive Walkthrough)
• PUEA (Predictive Use Error Analysis)
• ECM (Extended Control Model)
• ETTO (Efficiency-Thoroughness Trade-Off)
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