Figure 27.3 illustrates the format of a time-line chart. it depicts a part of a software project schedule that emphasizes the concept scoping task for a word-processing(WP) software product. All project tasks(for concept scoping) are listed in the left-hand column. The horizontal bars indicate the duration of each task. When multiple bars occur at the same time on the calendar, task concurrency is implied. The diamonds indicate milestones.