HHI944:
That big gun won't do you much good if you need to fire around the corner...
My elaborate plan is only good if I assume the perp is looking for valuables to steal, and does not want to engage with the owner of the premise. IF he thinks I have more valuables where I have taken up a defensive stance, he can enter at his own risk - but he is aware of what to expect.
If the intent of the intruder is to kill me, then all my plans are moot, since the perp will likely already be a step ahead of me. By the time I am aware of what's going on, the invader/invaders are probably already upon me, and attacking me. If I can reach my firearm, then there is no plan, there are no steps and sub-steps, no tap-rack-bang --- just bang-bang-bang.
Since most home invasions are of the theft-type, my plan is focused on that.
In adrenaline dump situations, like home invasions, fine motor skills and quick decision making processes are one of the first things to go, which is why your three-step plan may not be effective. Your first step is 'Defend yourself.' Ok - HOW? Think you will be able to figure that out when someone's in your home and you have adrenaline pumping through you? Is your defense simply "Grab gun and shoot?" Any thought about putting yourself into a defensive position where you can acquire the target, but the target would have a hard time firing at you? Any thought on what lies behind the target area? A child's bedroom? The wall to another apartment? A window? How are you going to 'communicate' after the event? (Don't assume anyone will be calling for flashy lights) What are you going to say and do when the police arrive? If you don't think these things through prior to the incident, you think you will be able to keep these considerations in mind during an incident?