Methods for planning a security array of sensor units are provided. In one embodiment, the method provides an optimized security planning for at least one entity. The method includes the steps of: receiving design data (for instance, geographically-referenced information) indicative of the geographic location; receiving data indicative of the sensors attributes (for instance sensor type, cost, weight, range); receiving data indicative of the preferred coverage area; receiving scenario constraints (for instance specific points of interest); conducting a graphic simulation of the proposed solution; generating multiple alternatives for the proposed solution.