Power Levels

The use of power levels is to get an estimation of how a battle will fare between two opponents of known power levels. In general, if one has a higher power level than one's opponent, then he/she can defeat the one with the weaker power level. For example, "Person A" has a fighting power of 10,000 and "Person B" has a fighting power of 5,000. "Person A" can most certainly defeat "Person B". However, the factors of speed, strength, and technique can also come into account when deciding the outcome of a fight. 
It should be noted that, when factoring in the edge a fighter has over an opponent, the difference in power levels as a flat number is apparently not important, but rather, the relative or percentage difference between the power levels of the two combatants