1.  Observe - Observation as we all know is our biggest ally and yet also our biggest foe on the paintball field.  You can never have to much information, BUT you can have to much bad information is a saying I like to keep in mind on the field.  Sure the information you get over the radio is great to have but does it pertain to your situation?  Are the enemy sightings actually helping you push forward with little risk to your self or are they confusing you causing you to freeze at a moment when you could have pushed your advantage?  Thats where your personal observations of the engagement zone come to play.  You process all this incoming information

•   Enemy fire/Position
•   Friendly fire/Postion
•   Any and all cover in your vicinty
•   What shooting lanes do you have covered
•   What information is your squad mates giving you
•   Sounds to indicate an approaching enemy
•   Shadows and Movement
•   And any and all other information that you recieve on the field

2.  Orient - Orientation is something that is unique to each person out there based off of personal experience & bravado.  A perfect example is you as Player A and your opponent Player B have come to an impasse and are keeping eachother pinned at the corner of your respective bunkers.  What do you do to end the stalemate?  The answer is only something that you can answer.  Are you a gutsy player?  Or do you tend to hang back to get the rythm of your enemy before popping off your shot?  There are so many factors and playing styles that it is impossible for me to say what you as Player A is going to do in that situation.  As you can see though orientation is basically done for us as we are all individual people, same as if you are adapting this for squad use it again is going to be individual to each squad as each squad will have different experience levels.  Orientation will also affect how you observe things or how you decide things so it kind of hitches a ride through out the whole process.

3.  Decide - This is the brass tacks phase that is based off your obervations. This is the point where you pick what option you are going to take and what route you are going to go about accomplishing your task.

4.  Act - Like the name indicates this is when you act on your desicion with out hesitations.

This is a repeating pattern hence the loop part.  Once you've acted you know have new observations.  With your new oberservations you have new decisions to make. With new decisions come new actions, which leads to new observations.  An ever changing, ever evolving decision making process.

This all can happen in a span of 5 minutes if you are a commander looking at a map of troop positions and reported enemy sightings, issueing commands and waiting for intel to come back on the out come of those orders, or this can happen in a split second as you are turning the corner of a building and run smack dab into an OPFOR squad.  As stated earlier this can be done on an individual basis or on a squad level basis, but alot of practice needs to be put into squad based implementation as each individual needs to trust that each other member is going to be in their position at the right time in the maneuver.

The key to monopolizing on the OODA Loop process and turning it into a winning strategy is to use it faster yet better than your opponent.  By better I mean making meaningful and proactive decisions and not to always be reactive.  Not allow them to get the observations they need possibly by feeding them false information.  Or allow them to make their decisions by making an ambush plan where they can only make one decision.  Or not allowing them to act at all by laying down a heavy field of suppressive fire as your squad mates move to flank the OPFOR's position.

So it all comes down to making your decisions in the least amount of time using the best and most knowledge.