A lot of companies have lots of assets tied up in plant and equipment. Well, is it old plant, or is it new plant?
I agree with Warren to keep it simple and not use higher mathematics in your analysis.
I find it helpful to buy near the low of the last few years.
Try not to let your emotions affect your judgement.
Look for companies that do not have a lot of debt.
I have been around a long time and Wall Street has changed a lot.