Assume that we have been operating our system without problems and now we are on the fifth day of our operation. The little triangle on the time line window represents the current time. By dragging the triangle we can move the current time. In figure breakdown-view we have moved the triangle to the position C5. In the gray area, the value of the current time gets updated. For some reason, on day 5, airplane C141B-14 becomes unavailable. Notice the light gray rectangle denoting the resource unavailability and the dark rectangles inside representing the conflicts.