Well, first you must decide what you are animating for. The web is best served at 12-15 fps. Broadcast at 30 fps. So lets say you want to have a man sitting and then standing and then walking. Sitting might be two seconds. Standing perhaps another two seconds before he makes the decision to walk. If you cut here to another angle you can animate the walk seperately. If not and you want to have him walk out of frame for four seconds, you combined total is:

Sit = 2 secs + stand = 2 secs + walk = 4 secs for a total of 8 seconds. Web x 15 fps = 120 frames. Broadcast = 240 frames. Key frame your animation using Linear Motion (see Help or Manual) and use the Walk Designer for your walk out. Tweak as required. Position camera. Render Low rez. Watch. Tweak again. Render Low rez. Confirm. Render Hi- rez.

Hope that helps.

JG