Multiagent Plan Execution and Work Practice: Modeling Plans and Practices Onboard the ISS

Numerous interdependent and uncertain constraints affect plan execution onboard a space ship. Plans are often invalid as they are being executed in the real world. Human work practices partly develop to deal with these realities. However, practices are difficult to study and represent within traditional planning tools. We discuss how modeling the work practices of the ISS Crew is used to develop a plan execution method that can deal with real world situations onboard the ISS. Brahms—a multiagent activity-based language—is used to model situated action and plan execution of human activities in practice.