Portfolio Managers and Value Creation

[Acid]

Hi

According to J,S & W one of the strategic rationale to value creation is to include portfolio managers whos work is to provide a financial discipline. They may purchase under performing companies and then sell them or involve Asset stripping or install a new management etc.

So whats that got to do with value creation? Its simply like opening a new seperate business...how does this add to the current activities of the business and add value?

Thanks
Acid