© www.mitar.co.uk 2011
Rat, Mouse & Crawling Insect Risk Calculator
Risk Level
Probability
Severity
Unlikely to ever experience rat, mouse or crawling insect activity
Some rat, mouse or crawling insect activity may be experienced
Regular rat, mouse or crawling insect activity may be expected
Extremely likely to experience considerable numbers of rat, mouse or crawling insect activity
Regular rat, mouse or crawling insect activity highly likely
1.
5.
4.
3.
2.
Virtually no impact on business, stock, building or staff
May cause minor damage / contamination / distress / finacial loss
Likely to cause minor damage / contamination / distress / finacial loss
Likely to cause substantial damage / contamination / distress / finacial loss
Likely to cause great damage / contamination / distress / finacial loss
5.
3.
4.
2.
1.
To establish risk of rat, mouse and crawling insect activity on site, a rating between 1 - 5 should be decided for both the’probability’ and ‘severity’ as shown
below
Probability
Severity
1.
2.
3.
4.
5.
2.
3.
4.
5.
8
15
12
9
6
10
8
6
4
25
20
15
10
20
16
12
The ‘Probability’ (1-5) should br multiplied by the ‘Severity’ (1-5) to give a score between 1 and 25.
Risk Assessment Score
Routine Visits per Annum
QA visits per Annum
1 - 5
0
12 - 24
16 - 25
11 - 15
8
6
4
6 - 10
0 - 4
0 - 4
0 - 1
The Risk Assessment score is a good indicator as to the ideal service frequency on site although this can change quickly and so should be considered
on an on-going basis.
west lothian, scotland, lothians, ants, environment, rodents, insects, other pests, specialist services, strip curtains, landlords, housing assiciations, facilities companies.
