Security risk matrix aggregation calculator

Calculate risk ranking under supplied scores and treatment budget with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Choose the currency for these amounts. Changing it keeps your numbers and does not convert exchange rates.

Use risk ranking under supplied scores and treatment budget to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

JSON Risk entries [ID,user likelihood score,user impact score,user exposure weight,treatment cost currency] (USD)
[["A",3,4,1,200],["B",2,5,1.2,300]]
Likelihood sensitivity multiplier
1
Risk ranking under supplied scores
[["A",12],["B",12]]
Treatment budget (USD)
$500.00
Total weighted score
24

Try another scenario

JSON Risk entries [ID,user likelihood score,user impact score,user exposure weight,treatment cost currency] (USD)
[["A",3,4,1,200],["B",2,5,1.2,300]]
Likelihood sensitivity multiplier
1.2
Risk ranking under supplied scores
[["A",14.4],["B",14.4]]
Treatment budget (USD)
$500.00
Total weighted score
28.8
Calculation method

Calculation method

Risk ranking under supplied scores

J(sorted([[r[0],r[1]*b*r[2]*r[3]] for r in a],key=lambda r:(-r[1],r[0])))

Treatment budget (USD)

sum(r[4] for r in a)

Total weighted score

sum(r[1]*b*r[2]*r[3] for r in a)

Symbols and units
a
JSON Risk entries [ID,user likelihood score,user impact score,user exposure weight,treatment cost currency] (USD)
b
Likelihood sensitivity multiplier

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Calculation steps and notation

sum(list) adds all entries in the list.

Assumptions & limits

Assumptions & limits

  • Ordinal scores multiplied only as an explicit user convention; no probability, expected loss or security certification implied. Supported limits: All numeric inputs must be finite. Only the explicitly described mathematical scenario is supported.
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