From a basic military stand point I would say it is having all the proper supporting information, analysis and resources to act. Meaning that you have the full puzzle picture, and are fully prepared to act based on the collection and analysis of the pieces of that puzzle.
Strategic Example: You would have information on the enemy’s location, abilities/capabilities and support resources. You would have clear analysis on the projected enemy reaction to any actions taken and you would have analysis of the level of force necessary to act (ground, sea and air forces). You would have all the resources readily deployable to the theater of operation and you would have a primary strategy as well as contingency strategies ready and available. It would be like walking into the oval office with war plans drawn and ready, everything is set, resources are in place, the information is as good as it’s going to get and all you are waiting on is the green light.
Operational Example: You have good information on the enemy’s location, abilities/capabilities and support resources. You have a good plan of attack and you have the tactical assets available in the operational area. You have coordinated with all supporting units and are fully ready to act.
Tactical Example: You are boots on ground and get solid information on the enemy (SALUTE report), you have support in route or standing bye and you have the ability act.