Shift changes, updates, and the on-call architecture in space shuttle mission control

Area of Science:

• Human Factors Engineering
• Cognitive Systems Engineering
• Risk Management in Complex Systems

Background:

• Increasing interest in reducing personnel in high-risk operational domains.
• Need for effective knowledge transfer during 'on-call' architectures.
• Challenges in updating supervisory controllers in distributed, continuous processes.

Purpose of the Study:

• Investigate the process of updating supervisory controllers during critical operations.
• Understand how practitioners are brought up to speed in anomaly-driven environments.
• Identify factors influencing effective status updates during shift changes.

Main Methods:

• Conducted targeted field observations.
• Observed sixteen shift changes (handovers) during the STS-76 Space Shuttle mission at NASA Johnson Space Center.
• Focused on continuous, anomaly-driven processes in a complex, distributed environment.

Main Results:

• Prior knowledge significantly impacts the effectiveness of controller updates.
• Missing or inadequate updates leave flight controllers vulnerable and unprepared.
• The quality of information transfer during handovers is critical for operational safety.

Conclusions:

• Emphasizes the importance of robust handover protocols in 'on-call' systems.
• Suggests strategies to mitigate risks associated with reduced personnel and rapid updates.
• Highlights the need for incorporating prior knowledge into operational update procedures.