Which of the following is not a good use case for the dependency column?

The dependency column is designed to establish relationships between tasks, indicating that one task cannot be started or completed until another task is finished. This is particularly useful in project management, as it helps to visualize task order and ensure that processes flow smoothly.

When considering the provided options, the use case where a status can only change when the task has started is not aligned with the primary function of the dependency column. The dependency column is not meant to represent changes in status based solely on the starting point of a task. Instead, it is focused on ensuring that certain tasks are completed before others can proceed, which is more accurately reflected in options that highlight task sequences and relationships.

In contrast, tracking projects across multiple boards, managing tasks on different timelines, and ensuring task completion in a specific order all directly relate to the effective application of the dependency column. These scenarios demonstrate how the column can facilitate the management of interdependent tasks, ensuring that tracks toward completion are clearly outlined and adhered to.