it is good to model various ratios and historic data, but more important to evaluate why the ratios are what they are, and what the outside environment is like.
what are the peer names doing
what sectors are doing well, bad...why?
what role is marketshare playing, adversarial trade, what motivations are there
what are the porter 5 forces?
what is the market doing relative what it should be doing.
what changes are already known in the marketplace that do not fit.
what role will creative destruction "innovation" play. what systems will be destroyed, who will be in best place to act on this innovation.
once an analyst system in place, develop an analyst intern process.