Forecasting/Modeling Techniques

Looking at FT recruiting soon. How do most banks forecast values for public companies? Does each bank do it differently or is there a standard?

During my SA stint, I have been using Wall Street Consensus values for forecasted values and for any values that aren't forecasted, I would use the % of (insert correct metric). Just wanted to understand if this is just my bank/office or if all banks do it the same.