Final answer:
Using an organization's time sheets for project work-effort tracking focuses on project inputs rather than outputs, which makes it poor project monitoring.
Step-by-step explanation:
The poor project monitoring when using an organization's time sheets to track project work-effort is due to its focus on project inputs rather than outputs. This means that it prioritizes the data related to the tasks and activities involved in the project, rather than the final results or outcomes. Additionally, it may also focus on data that don't change or easily acquired data, which may not provide a comprehensive picture of the project's progress and success.