Why do you think organizations should develop their own information technology project management methodologies? Why can't they just follow a book or methodology that has already been developed?

The issue with following a project management methodology from a book is that, while it would have many best practices, it also does not take into account the culture of the organization in question.  Every organization is different, with it’s own business rules and traditions, requiring it’s management strategy to adjust based off the organization.  While you can use a book methodology as a basis, you won’t get as efficient management as if at least customized your own methods.

-Matthew Tridento