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Knowledge / Automation & Control Systems

Automation Safety and Reliability

Designing automated systems that fail predictably and protect people, equipment, and processes.

By Siddhant Krishna · Published 2026-10-06 · Updated 2026-10-06

01

Safety Engineering

Safety engineering aims to prevent automated equipment from causing unacceptable harm. Safety must be designed into architecture, hardware, software, procedures, and human interaction rather than added as a cosmetic layer.

  • Emergency-stop mechanisms.
  • Physical guarding.
  • Interlocks.
  • Redundant sensing.
  • Fault detection.
  • Safe-state transitions.
  • Access control.
  • Operator procedures.

02

Failure Modes

Automated systems must account for sensor failures, actuator failures, communication loss, software faults, power loss, unexpected environmental conditions, and incorrect operator assumptions.

03

Fail-Safe Design

References

  1. IFAC, international scientific and professional federation concerned with automatic control theory and applications.
    https://ifac-control.org/
  2. NIST, research and engineering foundations for cyber-physical systems.
    https://www.nist.gov/programs-projects/cyber-physical-systems
  3. International Electrotechnical Commission, Part 3: Programming Languages, fourth edition.
    https://webstore.iec.ch/en/publication/68533

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