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Guides to systems engineering and functional safety methods for practising engineers.

• What Is IEC 61508?

  IEC 61508 explained: the functional safety standard for electrical, electronic and programmable electronic safety-related systems, its parts and lifecycle.

  19 October 2026

• What Is a Safety Integrity Level (SIL)?

  Safety integrity level (SIL) explained: a target on a safety function, PFDavg and PFH, how a SIL is determined, and the three requirements to meet it.

  13 October 2026

• What Is Failure Mode and Effects Analysis (FMEA)?

  FMEA explained: identifying how each item can fail, determining the effect of each failure mode, and ranking them for action.

  9 October 2026