Narrator: There are many schools of thought on calculating force ratios. Here is an example of a relative combat power assessment using an Excel spreadsheet. Click on the DATA tab to see the force equivalence or CP Combat Potential data for your own friendly forces and the enemy forces. Note that a Marine Expeditionary Brigade is assigned a 370, while a Tunisian Mechanized Brigade carries a force equivalent of 325. Compare that with a Libyan Infantry Brigade mounted in BMP 1’s which maintains a force equivalent of 745. Click on the CP RATIO tab to see the force on force calculations. The force ratio is determined by multiplying the number of units, times the strength, times the CP from the DATA table for each type of enemy and friendly force in the engagement. Add up all the force ratio data and multiply it by numeric values for Posture; Terrain; Water Obstacle; and the comprehensive subjective Combat Effectiveness Value or CEV which equates to unit training, proficiency, leadership, general soldiery, tactics, doctrine, C2, and morale. This gives you a single strength indicator for friendly forces and one for enemy forces, which are then compared to create a relative combat power ratio. Next, click on the type of mission, such as Deliberate Attack for Friendly Forces and Prepared Defense for Enemy Forces to see the Loss Estimate based on the relative combat power, for each force.