field 1314 the customer 104 selects the semesters to act upon for example via drop down menu 1314 the customer 104 can select the fall semester only the winter semester only etc in the example of fig1 the customer 104 has selected the fall and winter semesters of school xyz as a result the service provider 108 when evaluating this trigger will automatically determine the dates associated with the fall and winter semesters of school xyz this may be done for example by issuing an appropriate query to an appropriate information source 114 such as the web site of school xyz if instead the customer 104 elects to manually define the dates associated with the desired semesters then the customer 104 enters such dates via a manual panel 1310 the manual panel 1310 includes fields to define a start date 1316 and an end date 1318 additional periods can be defined by pressing the more button 1320 other detail windows associated with particular events logical operators and or actions will be apparent to persons skilled in the relevant arts based on the teachings contained here 0064 fig3 illustrates a flowchart 302 representing the operation of a service provider 108 in accordance with an embodiment of the invention in step 304 a service provider 108 provides service to a customer 104 in accordance with a first service level previously defined for example in step 204 of fig2 in step 306 the service provider 108 receives notification of a projected or actual change in the level of consumption utilization of the service such notification may occur when the customer 104 explicitly changes the service level for example as in step 208 of fig2 alternatively such notification may occur when a service adjustment trigger is activated or invoked.