As I understand the article, knowing which tasks to include in the 80% that you do, and the 20% that you ignore requires some active analysis. So the active an

As I understand the article, knowing which tasks to include in the 80% that you do, and the 20% that you ignore requires some active analysis. So the active analysis is effort you have to expend until you know which part to do major effort. This means to me the analysis can be helped by specialized processing, indexing, and filtering to minimize analysis done during all the runs. The trade-off of these specialized steps must be over-all more efficient than just doing the active analysis every time.