A software programming team used a Line Graph during the test phase to track unfixed defects relative to release goals (See the illustration).
About half-way through the project it became evident that the goals would not be reached in time to meet the schedule. A subsequent improvement project identified that the team was spending time in low-skill testing when they could be better employed in higher skill defect fixing. An automatic testing harness was identified and installed, freeing time to fix defects. The release goals were met just in time.