Tag Archives: Dr Melvyn Langford

Risk-based thinking – it’s risky not to understand the mathematics of risk (and randomness)

Dr Melvyn Langford explains how the US Department of Defense (DoD) invented the 5×5 risk matrix in the 1980s. The methodology uses ordinal numbers (which are only for ranking) as if they are suitable for calculations.  It is misleading, meaningless and … Continue reading

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