2-38. Commanders use lines of effort to describe their vision of operations to achieve end state conditions. These lines of effort show how individual actions relate to each other and to achieving the end state. Commanders often use stability and DSCA tasks along lines of effort. These tasks link military actions with the broader interagency or interorganizational effort across the levels of warfare. As operations progress, commanders may modify the lines of effort after assessing conditions. Commanders use measures of performance and measures of effectiveness to continually assess operations. A measure of performance is an indicator used to measure a friendly action that is tied to measuring task accomplishment (JP 5-0). A measure of effectiveness in an indicator used to measure a current system state, with change indicated by comparing multiple observations over time (JP 5-0).