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Fse-common-cause-failure-v2.svg (SVG file, nominally 900 × 600 pixels, file size: 9 KB)
Summary
Probability of losing sprinkler protection for one and two systems, with independent failures and with a shared water supply. Based on Parkinson et al. (1994), as cited in Nowlen et al. (2005b), p. P-6, and Barry (2002), p. 5-201.
Original illustration for Common cause failure, level 4 Expert.
- Source basis: Parkinson et al. (1994), as cited in Nowlen et al. (2005b), p. P-6 (unreliability 0.02, excludes dependent failures and maintenance unavailability); Barry (2002), p. 5-201 (80 h per year downtime example)
- Alt text: Log-scale bar chart: one system 0.02 or 0.029 with shared supply; two systems 0.0004 if independent, 0.0095 with shared supply.
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New drawing by Fire Safety Academy. © Fire Safety Academy.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 17:38, 2 November 2026 | | 900 × 600 (9 KB) | Jan (talk | contribs) | Watermark: Fire Safety Academy logo icon, 70 px, 45 % opacity |
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