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# Iso 27005 Risk Value [Solved]

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christossol
3Posts
Friday February 17, 2017Registration date
February 21, 2017
Last seen
- Last answered on Feb 21, 2017 at 05:06 AM
by Mazzaropi

I really thank you for your reply but the formula does not work 100%. It seems that it doesn't read one of the variables.

See explanation below

SITE Severity 3 (Cell B3)

Prop vuln

L M

Risk / Threat 4

Your formula:

LOOKUP(C3, {"H","M","L"}, {2,1,0}) + LOOKUP(D3, {"H","M","L"}, {2,1,0})+($B$3)

and i added my constant row value which is the Site Severity ($B$3)!

I've changed the variables to "H"=high,"M"=Medium,"L"=Low.

For some reason though the formula does not see the entry for "L" nor in the first part or in the second part of the formula. If I enter the letter "G" it produces error. If I enter the letter "L" it gives wrong result ....

In the example above

L+M+3 should be equal to 4 but it returns the result 6!

H = 2

M = 1

L = 0

Again i really appreciated your feedback.

The aim is to calculate the risk value for a building according to ISO 27005. The above calculation is based on a standard matrix.

Regards

Christoss