Forecasting is quite an art so I've never expected them to be correct most of the time. The accuracy will depends largely on the industry (is it relatively steady or cyclical? Predicting the top and bottom of cyclical industries are difficult) as well as how far out the forecast is projected.
The current period consensus (i.e. average or median amongst several analysts) can sometimes be useful... if nothing else, you expect a large company to make some sort of market guidance announcement when they discover that their earnings will vary significantly from current range of analyst forecasts.
What is interesting in this case is that the forecast and the price objective seems completely incongruent. Their forecast may or may not be right but at least they should apply those input consistently. May be they simply said too much risk therefore assume price target of 30% of NPV or something like that. Which again means all the forecast is a complete waste of time if the analyst simply ignores the answer it gives him/her.
I am in agreement that forecasting is quite an art, but if they are not accurate why look at them? Or even bother doing them? Surely looking at an inaccurate forecast could subconsciously influence an investment/trading decision?
In my view, about 1% (or thereabouts) of all businesses have a sustainable competitive advantage, which makes it possible to make a medium term forecast, thus allowing an intrinsic value calculation. Would you agree with 1%? If not, what do you think it is? (I would value other posters view on this).
If you are in agreement about 1%, what on earth do you do about the other 99%? The whole point of the game is to guess the future correctly! If a forecast is so inaccurate (basically a wild guess), it actually is a waste of intellectual effort … an investor/trader may as well just apply some simple entry/exit criteria and disciplined money management.
Having said that, some people have obviously worked out how to accurately forecast stockmarket returns. Read the articles on Statistical Arbitrage by Edward Thorp - http://edwardothorp.com/id9.html. Can the average investor/trader really compete against a card counting mathematics professor, who plays Bridge with Buffett and has access to supercomputers?
On a final point, related to your comment about the inconsistency of valuation logic applied by the research houses, I am really surprised that any professional organisation would let that out of the door.
Cheers