Table 2

FMEA scoring tool

4—Catastrophic3—Major2—Moderate1—Minor
Severity categories Failure could cause death, injury
Patient outcome:
  • Death or major permanent loss of function (sensory, motor, physiological or intellectual)


Visitor outcome:
  • A death; or hospitalisation of ≥3


Staff outcome:
  • A death; or hospitalisation of ≥3


Equipment/facility damage:
Firer beyond incipient stage; or damages ≥US$250 000
Failure could cause high degree customer dissatisfaction
Patient outcome:
  • Permanent lessening of bodily functioning (sensory, motor, physiological or intellectual); or

  • Increased length of stay or increased level of care for ≥3 patients


Visitor outcome:
  • Hospitalisation of 1–2 visitors


Staff outcome:
  • Hospitalisation of 1–2 staff; or

  • ≥3 Saff experiencing lost time, or restricted duty


Equipment/facility damage:
  • Damages US$100 000–250 000

Failure can be overcome, but there is minor performance loss
Patient outcome:
  • Increased length of stay or increased level of care for 1–2 patients


Visitor outcome:
  • Evaluation, treatment of 1–2 visitors


Staff outcome:
  • Medical expenses, lost time, or restricted duty for 1–2 staff


Equipment/facility damage:
  • Damages US$10 000–100 000; or

  • Fire, at/smaller than incipient stage

Failure not noticeable to customer, no effect on delivery of service
Patient outcome:
  • No injury, nor increased length of stay, nor increased level of care


Visitor outcome:
  • Evaluated but no treatment


Staff outcome:
  • First aid only, no lost time, or restricted duty


Equipment/facility damage:
  • Damages <US$10 000; or

  • Loss of utility without adverse patient outcome

Probability ratings Frequent
Likely to occur immediately or within a short period (may happen several times in 1 year)
Occasional
Probably will occur (may happen several times in 1–2 years)
Uncommon
Possible to occur (may happen sometime in 2–5 years)
Remote
Unlikely to occur (may happen sometime in 5–30 years)
  • Risk priority number (RPN) is calculated by multiplying severity score by probability score. Issues are considered significant priorities if RPN is between 8 and 16 on scale of 1–16.

  • FMEA, failure mode and effects analysis.