Slamat Siang De!
You just ask the relevant questions to the relevant target group. Then collate all the answers into tables:
So for instance, asking about TVs- Which brand do you think is better?
Some may say Sony, Some Panasonic, Some Toshiba, Some Sharp, etc etc etc
You will then have a percentage of the whole number of people asked; so (say) 49% think Sony is best. 23% said Panasonic etc etc
That's an easy quantative question.
On a qualitative survey, there might be more searching questions about attitudes- but with the same question asked repeated number of times there will be a concensus. There will be some oddball responses. There always are. These will be no more than about 5%, and will be discarded by the client. The bulk of people will say: I want Sony, but I wish it was cheaper! But actually Hitachi is more reliable or some such finding. But there will be a majority who think one way or another- and that is what the client will want to determine.
Hope it helps. Just send some Penang laksa with extra blachan.