4-30. The simplest adjustment is reallocating resources. This normally provides additional assets to the decisive operation; however, some situations may require reinforcing a shaping operations. Changing the concept of operations adjusts the way the force executes the operation without changing the mission. Commander’s normally do this to exploit an unplanned opportunity or counter an unexpected threat. When reallocating resources or changing the concept of operations does not solve a problem hampering mission accomplishment, the commander may have to change the mission. Commanders change the mission only as a last resort. When they do, the new mission still must accomplish the higher commander’ intent. Table 4-1 summarizes a range of possible actions with respect to decisions made during execution.