Thank you, Andreas!
Yes, I know this and I have set my preferences on the menu you have attached. Maybe my question was not very clear. What I meant was that in my case I have assessed the used datasets with "Good" or "Very good" and after the calculation, the assessment says "Poor/Very poor" to many of indicators, specifically on the Time representativeness. This just doesn't make sense since the specific datasets are valid until end of 2019.
If a custom data quality system is used, does the database source matter?
And, one last thing I forgot to ask, how do we add uncertainties?