From the article:
You'll perform two or three different circuits of 5 exercises per day, each circuit being performed three times. There's no rest between the exercises within the same circuit and you can rest for 1-2 minutes once all three sets of a circuit have been completed.
Use sets lasting 50-70 seconds (12-20 reps), this means 4 seconds per rep (three seconds down, one second up).
No rest between exercises within the circuit (or as little as possible). Perform the circuit three times.
You'll do A1, A2, A3, A4, A5, repeat twice more for three times total, then move on to B circuit the same way, then C circuit if you're not gassed (I only got to C circuit once).
Great program. I used it for 4 weeks and lost 15 pounds. I highly recommend it.
Also, read the article discussion for further clarification and list of exercises (I posted my circuit on there if you are interested in looking at it).