The principles at work for multiple striking are fairly simple. You observe the body's reaction to a strike, and base the next strike upon that reaction. Like a game of pool, preparation for the next strike is done while executing the first. Basically, you or cock the strike in the position from which it will need to start.
Pretty simple. But the underlying principle at work is correct targeting, and correct target grouping, which is not so simple. Luckily for most of us, we stand on the shoulders of geniuses who have come before us, and our techniques are already correct. We just have to disect it. Kenpo can be as simple or as complex as one chooses to make it.