参考论点:insiders's major advantage is they have orgainzaitonal savvy as they are familar with the organzition's structure, business process, company culture, and people
参考论点二:outsiders, particularly those from well-managed companies, can bring best practices which are valueable to organzitions.
the outside experts may also have a thorough experience over the sepcific field.more over ,the experts may have experienced many similary cases from other similary companies ,thus provide the experts a wide knowledge and perspectives.on the other hand ,the experienced employees may just focus their attention on the problems of own company.
I remember one of the GWD passge concerning pay-system suggested that consultant company may have a vested interest since it can continue to solve the problem its advise bring about.