Hmmm. these questionaires are obviously to your (williams and co) customers...
Not really. Although we did email our database (which is a significant fraction of the entire number of registered gas engineers and includes many thousands who don't actively trade with us) most of the responses came from Facebook groups which have no connection to us other than the fact that we are active in them. We did get a number of answers from members of this forum, which we sponsor, but is not limited to our customers.
If there is a bias, I suspect that it is towards digitally active installers - who may have a younger age profile that the whole population (although I wouldn't bet on that these days).
Im sure youll come back with an argument. But in mid range (duotec) and higher end (platinum) you don't have a competing baxi.
Ravenheat (budget), Potterton(mid market) and Atag (premium) all come out pretty well in the survey, despite the fact that we don't stock them, and in the case of Ravenheat and Atag, we never have.
Also, if it was biased towards Williams customer preferences, then Worcester should have hammered Vaillant in the premium category, as we sell very significantly more Worcester than Vaillant. But they didn't.
Surely to validate this. You would have to ask the question in relation to the choices............
When we publish the full data regarding build quality, ease of installation, ease of service and all the other sub-sets of data, you will see that we separated out the models within brands, so we asked specifically about Ecotec Pro
separately from Ecotec Plus, Duotec separately from 200/400 and so on across all the manufacturers.
Items like rep support, tech support and pre-sales information are dealt with by brand, not model, as your Worcester rep is the same person whether you fit entry level boilers or CDis.
We also controlled for experience - at the very start of the survey, it asks what models the respondent has installed or serviced in the last 12 months, and then only asks questions about those models. This was an attempt to distinguish current experiences from biases based on past models or behaviours.