Modeling

Systems modeling is the interdisciplinary study of the use of models to conceptualize and construct systems. This section describes the resilience-oriented considerations and activities incorporated in the modeling stage.

Basic models

• The extended system ... - the role of operators and users in the system modeling
• States and situation
• Modes and scenario
• Mode-state compatibility ... - mode selectors and state machines
• Interaction ... - the roles of the human operators and of the machine during the interaction
• Interaction protocol

Hazard related models

• Exceptional situations,
• Hazards, alerting, detection
• Alarm risks ... - sources of the failure to generate proper alarms
• Alarm perception .. - the awareness of the operators about new operational risks
• Alarm fatigue ... -  the time it takes for the operator's to respond to a particular type of alarms,
• Mode confusion
• Cost perception ... - constant increases in the magnitude of a stimulus typically evoke smaller and smaller changes in response.

Incidence related models

• Incidence-generation ... - the changes in the system situation and behavior from normal operation to the incidence
• Primary hazard ... - the events and changes in the system situation and behavior from a fault when in normal operation to the incidence
• Risk timeline ... - the pattern of changes in the risk level in a typical instance of incidence generation
• Problem solving ... - the operator's mental activities during problem solving
• PL ... - following the Swiss-Cheese model, defense design is based on protection layers.

Unexpected

• Hazard, situation, scenario, event

Related topic

Updated on 19 Mar 2017.