This topic is of great interest to me, and it should be of great interest to any PhD student in Germany where cumulative PhD are offered. The cumulative diss. is the best possible way to do a dissertation. Two of my students, Titus, and Umesh, just got done with cumulatives, and it's amazing: three papers each.
When I got done with my PhD, I had zero publications stemming directly from the PhD work. It took me one more year to get a book published, and then another three years before I got my first major paper published. Compared to that, having three papers under review or published (in both Titus and Umesh's case, one is published and two under review) at the moment of submission is amazing and worth replicating. Even if the submitted papers are rejected, it is great to hit the ground running.
The only problem is: it's very hard to replicate this kind of performance. In order to do a cumulative, you need to get started real early with writing and submitting articles, and in a typical PhD, one cannot get enough data for a publication until one is well into the second year (in my own case, I had data within 3 months of becoming all-but-dissertation, but I had gone to India with five laptops and gathered 250 subjects' data in a month or two). Also, in psycholinguistics, journals articles are long-drawn out affairs, with ritualistic introductions that go on and on, and the obligatory long General Discussion, usually consisting of large amounts of waffling and wild speculation (I exaggerate wildly, but GDs are too long for my taste; in my own journal articles I try to create a new culture by making it short, but reviewers always complain about too-short GDs). It would be awesome if journals would encourage pithiness rather than (and I use this word in its correct sense, cf. Sarah Palin's illiteracy on display) verbiage. But that's not going to happen any time soon.
So students have to be able to write; even if the advisor (i.e., me) is intensively involved in the writing, they still have to be able to do the core writing themselves. This is hard enough for native speakers of English.
Also, students have to be ready to put up with the ugliness and fundamental lack of friendliness of the review process. Reviewers are often former graduate students who (even after they have become extremely-former grad students) were trained in green-beret universities to become attack dogs, and never learnt to become human again. Many reviewers like to nail a paper just because they can. No paper is ever perfect (at least, I have never read one yet that I would call perfect), but for many reviewers this is no reason to let a paper through.
Getting eviscerated by a nasty reviewer is not a pleasant introduction to the scientific process. The cumulative student has to develop nerves of steel when the rejection letter comes in, and that's one more thing to learn. But it takes many years to develop the thick skin necessary to be able to subsist within this kind of review culture. Unless one is born tough, it's hard to recover from this shock right away.
If one considers the fact that often a paper goes through many revisions before it is accepted, it can take up to three years or more to get a single paper accepted. If it's controversial (as most good papers are), then the chances of an argument with the reviewers are much greater.
So how can a student deliver three papers (this is informally our requirement at Potsdam) as part of a cumulative, and within three years? Is this possible to achieve?
My advice for a successful three year cumulative:
Five-step success program for a cumulative dissertation
Results guaranteed if you if drink the potion:
1. Don't waste two or more years trying to figure out what to do for your PhD. German PhDs require no course work, you are expected to start right away on research. My experience has been that whoever loses time in the beginning pays a heavy price towards the end (well, duh).
2. Forget about holidays, parties and the like and forget about the 9 to 5 work-life-balance stuff that you may have seen in Work-Life-Balance folders lying around the university; they are relevant for a lot of people, but not for a PhD student. A PhD is a 24 hr a day 7 days a week job, and a German PhD with a three-year window even more so (in the US, students typically take five years, often much more to get their PhD done in linguistics). Anyone who thinks they can do a PhD in three years and have a life is doomed. You should only be doing a PhD if you enjoy it anyway. It should be your entire life, for those few years. Never forget that the three letters in the abbreviation, PhD, stand for Total Immersion Program. Of course, I exaggerate a bit here; you have to sleep, eat. But the point is that if you are doing a PhD, it has to be a priority in your life for the few years that you are busy doing it.
3. As soon as you know what your first paper will be on, and as soon as the data comes in and you know you have a publishable result, don't waste time. The Daily Show is not going anywhere, it's always going to be online; the Colbert Report too. It's possible to have a rough draft of a normal sized paper ready in two to three weeks of full-time work. You just have to have the discipline to do it. If you are in my lab, I envy you, because your advisor usually reads papers very quickly and responds to drafts with lightning speed. He can help you get that draft ready for submission. But you have to produce a draft first.
4. If you worked hard the first year, you have data. By the first quarter of your second year, you should have a paper under review or under revision after an eviscerating rejection. By the first quarter of the second year, you should have a second paper under review/rejection. By the end of the third year, you should have your third paper under review. That's it. It doesn't matter how many times the papers get rejected (revise and resubmit, to a different journal if they tell you, "we never want to see you face again"), they need to be in the pipeline. Just before you submit the cumulative dissertation, you should have the papers under review (for the 100th time, if need be).5. That's it, you have submitted a cumulative with three publications either published or under review. As a last step, after submission, have a ritualized party: print out all those rejection letters and burn them (not in the Besprechungsraum please).