Help

Notes on calculating the average Envirometer

When calculating the average, the following methods are applied:

Standard calculation rules:

If you select the standard calculation rules, the system does not take into account whether or not the data have been filled in (completely). All data are included:

Advanced calculation rules:

If you select the advanced calculation rules, this means that:

You can select normal/ FTE/ turnover/ production. If you mean to apply the standard calculation rules, we advise that you select the ‘normal’ method. With the advanced calculation rules, every method (FTE/ turnover/ production) will yield different results. Below you will find how these averaging methods work, followed by an example for clarification.

Example using the advanced calculation rules

Below you will find the calculation of the average of three companies for a number of environmental items, using the calculation rules:

 

A

B

C

normal

FTE

employees (FTE)

5

6

4

(5+6+4)/3 = 5

(5+6+4)/(5+6+4) = 1

floor area (m2)

100

180

200

(100+180+200)/3=160

(100+180+200)/(5+6+4) = 32

electricity (kWh)

3000

not filled in

5000

(3000+5000)/2 = 4000

(3000+5000)/(5+4) = 889

glass waste (kg)

75

150

not filled in

(75+150)/2 = 113

(75+150)/(5+6) = 20

The results seem very different. That is because the FTE-method is scaled to a company with 1 FTE. The FTE numbers are therefore about a factor 5 lower than the ‘normal’ numbers. It shows that a chart of an FTE-average Envirometer only makes sense if you can compare it with the chart ‘per employee’.

The next table shows the different key indicators yielded by the two methods applied in this example. It shows that if all data are complete, the calculation methods yield the same results, although the results are affected if data are lacking (and showing the ‘to be completed’ status) from one or more the companies.

key indicator

normal

FTE    

electricity/floor area (kWh/m2)  

25

28

glass waste/employee (kg/FTE)

22,5

20

floor area/employee (m2/FTE)

32

32