Good point.
Don’t get overwhelmed by the thing, break it down to manageble steps. The following is just one method, not necessarily the best.
I would break the thing down to known elements you can get a handle on first. If this is an interview-heavy doc, count up the number of folks to be interviewed and figure a day rate package for shooting each one, and total those up. If you can schedule them so one gear rental covers everything, you’ve saved money. If you can get them to all show up in more or less one place to cut your travel costs, you’ve saved more money. Total up the interview shoots the production gear and expendables and per diem and etc. and get a figure. Are you going to buy any music? Do you need to get any insurance or clearances for some element? Calculate those. You are halfway to the estimate.
Now consider post.
You know from the number of interviews roughly how many hours of raw tape you’ll shoot. You will spend at least that amount of time digitizing and logging. I am a believer that more time spent in quality logging and previewing footage leads to shorter and more effective time in the actual edit. This digitizing step is the modern day equivalent of the offline “paper edit” we used to do in the ’70s and ’80s. Think of it as the first very rough edit, in fact. If you are a very detail-oriented logger, probably double or even triple the shot footage time for this step. Decide if you’re paying/charging full edit bay rates for digitizing or some lower rate, and calculate that. Set the number aside for a grand total later.
The edit itself:
If you are shooting to a script, you could for example pick a ratio of raw stock to edit time and calculate a rough average of expected edit time from that. The more experienced you are the more accurate these guesses get. What I’m talking about is sort of like the ratio of shot film to finished projected product, only I’m talking hours spent trying out and applying edits versus the number of hours of material available, and not necessarily the running length of the finished show. Nobody I know of uses exactly every frame he shot in the final edit, and takes only that amount of real time to perform a master edit ( we would call such a thing dubbing it, not editing 🙂 )
OTOH, nobody I know has the shooting to final ratio of Coppola’s Apocalypse Now either, but something in-between those two extremes.
Say the editing is more or less uncomplicated cuts of a simple tale, told sequentially by just cutting down the subjects responses for time in a generally linear style. Maybe you would figure a 3:1 edit-to raw ratio based on your skills and what you know about the project. You shot three hours of interview, so maybe the rough cut will take nine hours, using this rule of thumb, plus say four hours to log and digitize. This is assuming short occasional breaks, not necessarilly lunches and dinners. You have 13 hours down on this job. 13 hours with only bathroom breaks and coffee is a heavy day, makes more sense to say a day and a half to two days to do a nice edit boiling down the three hours into a finished program. So your spreadsheet or back of the envelope could show that day rate and the cost.
This is just very loose speculation at this point, mind you. In my linear days doing training vids, my hours ratio for editing was just over 2 to 1 for a simple job, but that was under very tightly controlled conditions, without too much fancy FX work, for something very prosaic and not especially creatively challenging, more like “tab a goes into slot b” kinds of things. With NLE and all it brings to the party in terms of creative options and storytelling technique, plus the ability to work with multiple versions and mix between them, I would expect a documentary could be anywhere from a tightly-planned, logged, and scripted one at 5 edit hours to each 1 hour of raw tape, all the way past 15:1 or 20:1 for something so loose it is completely “discovered” in the post process. So much of that depends on what kind of preoducer/director you are, how much anarchy and exploration time you can afford in a place that charges by the hour, etc.
Anyway, that’s one way (my way) to guess the actual edit suite time. Will you need to do captioning or add other voice tracks? Lay off HD and SD versions? That’s easily going to double the time. And graphics is the wild card, as has been mentioned before. Animating still photos, the cost of stock footage, making maps with builds and moving arrows, compositing… this is all going to have to be a separate budgeting step because it is so variable from project to project.
If you have an hourly edit fee rate in mind, now throw it against the predicted hours for post from above, and total this with the hours for logging/digitizing. Throw in two or three hours for making dub masters, safety copies, or burning simple DVD’s without any menus, just for approvals and review.
Add it to the totals from the shoots.
Now you have a *rough* idea of the time and thus money to be spent to get to the first rough cut stage. And that’s all you can do becasue you can’t predict what changes they’ll throw at you after that step. If the client or sponsor can meet this bare minimum figure ( AND you have not begun to figure profits yet! Just costs!)
you will be in relatively good shape. If you’re already far in the red on paper, over-cost or over time, before you’ve even figured in the profits, then the project needs to be re-evaluated to see how it can be brought in line with the resources you have, or you need to go dig up more money somewhere.
And believe it or not, that’s the SHORT version!:-)