Indeed, organizational change is often considered as a project. This does not mean that it would be framed using conventional project management methodologies. Perhaps using some of the standard project management tools in certain change areas might be useful. Especially if you want to show progress with respect to specified goals. But this does not suggest in any way that you have to have a budget and other project management objectives.

Managing organizational change is indeed a transformation project. Project management would apply to it as in deciding the outcoms, scope, process and making a plan, forming a transformation team and executing the project.

However the subject matter experts here will be drawn from Organization Behavior, Sociology and Psycology and HR Management. There is lot of literature available on Behavior change which can be of use.

The best information on successfully implementing change that I have found is in William and Susan Bridges' book, "Managing Transitions," 3rd edition, 2009. The authors tackle the human behavior problem head on and explain how to help people get through every phase of the change. As is nearly everything else unusual that we face, this is a project.

As pointed at in earlier comments, there are several possible sorts of organisational change. One broad category ,which might be called technological, refers to process or system changes brought about by new technologies. For instance, moving from electronic type-writing to 'word-processing'. Another may be labelled institutional (in older language 'cultural') but often resulting from technological change. A good example here is the shift from 'having a secretary' to 'answering your own email'. The most difficult sort of institiutional change is about shifting political power. A good example here is moving the glass ceiling with respect to under-represented gender or ethnic minority groups. While the examples are rather 'elderly' , they have the advantage of being well-researched and well-documented. The most useful reference on organisational change I've found is

Morgan, Gareth. (1986). Images of organization. Newbury Park, Cal and London: Sage.

Projects, in terms of project management techniques, are usually relatively short term (say up to 3 years) and have fairly well-defined objectives that can be planned, budgeted and delegated to a team of technocrats/specialists. 'Organisational change' may have clear goals but may not be acheivable in the short to middle term and is usually not manageable by technical project teams. With several decades of project, programme and policy implementation experience behind me, I cannot recall a single example of a project (using only traditional project management techniques) that resulted in cultural change (defined wrt attitutes, behaviour or social capital) in the long term . Projects that have had successful long term impact on the institutional context have been supported by consistent policy and been part of a longer term programme of instituional change. Having said that, all the succesful projects that I've been involved with have also drawn on strategies and techniques from disciplines such as psychology, sociology and political science and particularly ideas about how adults learn. A nice reference from policy implementation literature is

Barzelay, M., & Jacobsen, A. S. (2009). Theorizing implementation of public management policy reforms: A case study of strategic planning and programming in the European Commission. Governance: An Interantional Journal of Policy, Administration and Institutions, 22(2), 319-334.

Other possible recent sources may be available from OECD or World Bank but should be read with a critical eye.

The PMI have publishers a recent report onManaging Change in Organizations which might be useful to you.

I have just written a paper that covers IT implementation and Organisational change one of the main factors that will be included in the transformation process is, as noted above, behaviour. There are also different forms of transformation such as evolution or incremental change that occur slowly within a company and are generally managed and revolutionary change that can be a reactive process in response to changes in market conditions.

The Organisational change paper I have written has not been published formally yet but will be in the next edition of the International Journal for business and systems research however a paper I have published that relates to behaviour change can be found on my research gate page. You could try these papers;

Avgerou, C. (2001) ‘The significance of context in information systems and organizational change’, Information Systems Journal, Vol. 2001, No. 11, pp.43–63.

Avgerou, C. (2000) ‘IT and organizational change: an institutionalist perspective’, Information Technology and People, Vol. 13, No. 4, pp.234–262.

Keen, P.G.W. (1981) ‘Information systems and organizational change’, Communications of the Association for Computer Management, Vol. 24, No. 1, pp.24–33.

McMillan, E. (2002) Considering Organisation Structure and Design from a Complexity Perspective, Open University, Milton Keynes.

Oh my God!!! What a big and difficult task do you have.

Certainly project management is really important as a tool when an organizational change is decided. Specially for testing if changes are bringing benefits or chaos.

I agree that "Management of change" is an interesting project by itself. This project requires (like any other project):

clearly defined deliverable,

timelines,

budget and quality parameters. The quality parameters are : How smoothly the change is adopted/adapted and how the cultural issues are handled without transgressing the budgeted timelines.

Check out the recent PMI report:

Project Management Implementation as Management Innovation

by Janice Thomas, PhD, Stella George, PhD, and Svetlana Cicmil, PhD

I also recommend a most readable book (novel format-requiring only a few hours) by Rob Newbold and Bill Lynch, The Project Manifesto (http://www.amazon.com/Project-Manifesto-Transforming-Critical-Values/dp/1934979155/ref=sr_1_1?s=books&ie=UTF8&qid=1401291277&sr=1-1&keywords=the+project+manifesto), that presents the basics of multi-project management enveloped in a very well-written and engaging story.