Performance management software/performance measurement is there any need?

There are many ifs and buts in this statement. Do you really need such software for your company or not. This have been proved that companies have been able to add 60 to 70% more to their performance after using such performance management software/performance measurement programs. This surely will make you keep a constant check on your workers and under a constant check they definitely will deliver far better. This has another side of the coin as well; people say that if you are in real mind game business than under this constant check people may not be able to give you the best result.