For the calculation of the cleaning performance index (I_C) of a household dishwasher model, the cleaning performance of the eco programme is compared to the cleaning performance of a reference dishwasher.

The I_C is calculated as follows and rounded to two decimal places:

I_C = exp (ln I_C)

and

In IC=1/n×∑i=1nlnCT,i/CR,i

where:

C_T,i is the cleaning performance of the eco programme of the household dishwasher under test for one test run (i), rounded to two decimal places;

C_R,i is the cleaning performance of the reference dishwasher for one test run (i), rounded to two decimal places;

n is the number of test runs.