how do you decide what yeast to use?

Question: how do you decide what yeast to use?
- Keywords:
  decision,
  experiment,
  yeast
Asked by ellenrsmith to Charlie on 16 Jun 2014.
- Charlie Atwell answered on 16 Jun 2014:
  
  Heineken do a lot of research and experiments on types of yeasts and what to use to make the best tasting and quality drinks. They are always doing more research to look for new and improved drinks/flavours.

Question: how do you decide what yeast to use?