The high speed of technical and technological progress in combination with rapid social changes requires modern organizations to be able to react rapidly to changes in the environment. Naturally enough, organizations need to renew their products, technical equipment and technologies in order to not only survive, but also to advance in these conditions. But what is not less important, organizations need also deep changes in their philosophy, culture and strategy. But such changes do not happen per se, they have to be specially managed. In order to provide all mentioned changes the organization leadership needs in clear understanding the existing and desired states of organization as well as the methods of transition from existing to desired state. There are a tremendous number of books and articles representing various points of view on deep changes, but there is no one textbook which provides students and practical managers with an opportunity to learn about this issue from different points of view without spending a lot of time on searching and reading a great number of literary sources. The book is aimed to eliminate this shortcoming. Designed to be a hands-on resource it includes descriptions of the most popular approaches to planning and implementing deep changes. Meanwhile, the book is rather intended to make managers think, to assist them in their search for an individual way of changes than to provide them with a series of prescriptions on how to plan and to implement deep changes.