Matrix Organizational Management

I am opening this topic with the question

What is Matrix Organization Management?

The understanding I get from different aspects.

In Matrix Structure Management there is a pool from where resources are assigned to the Project Manager for a particular project. The Line Managers of the resources remains the same. The resources has atleast two reporting line.

1)Line Manager
2)Project Manager

This approach has its Advantages and Dis-Advantages. We will discuss them later.Lets focus on defining Matrix Organization Management.

Comments Welcome.