It was not an NDU study, nor was it a Pentagon study. Indeed, the implication of the Herald story was that this study was mostly about current events. Such is not the case. It was mainly about the period 2002-04. The story also hypes a number of paragraphs, many of which are quoted out of context. The study does not "lay much of the blame" on Secretary Rumsfeld for problems in the conduct of the war, nor does it say that he "bypassed the Joint Chiefs of Staff." It does not single out "Condoleeza Rice and Stephen Hadley" for criticism.
Here is a fair summary of my personal research, which formally is NDU INSS Occasional Paper 5, "Choosing War: The Decision to Invade Iraq and Its Aftermath."
This study examines how the United States chose to go to war in Iraq, how its decision-making process functioned, and what can be done to improve that process. The central finding of this study is that U.S. efforts in Iraq were hobbled by a set of faulty assumptions, a flawed planning effort, and a continuing inability to create security conditions in Iraq that could have fostered meaningful advances in stabilization, reconstruction, and governance. With the best of intentions, the United States toppled a vile, dangerous regime but has been unable to replace it with a stable entity. Even allowing for progress under the Surge, the study insists that mistakes in the Iraq operation cry out in the mid- to long-term for improvements in the U.S. decision-making and policy execution systems.
The study recommends the development of a national planning charter, improving the qualifications of national security planners, streamlining policy execution in the field, improving military education, strengthening the Department of State and USAID, and reviewing the tangled legal authorities for complex contingencies. The study ends with a plea to improve alliance relations and to exercise caution in deciding to go to war.
Also, Steve Metz made a good point when he wrote that this is like a professor at Duke criticizing the Bush Administration and then there being a headline in the Washington Post reading "Duke University Attacks Bush Administration."
...Or "U.S. Marine Corps prefers the Red Sox and Kansas basketball."