A project is experiencing quality issues with deliverables. Which quality tool helps identify the root causes of these problems?

Correct answer: Fishbone Diagram

Option D is correct because a Fishbone Diagram, also known as an Ishikawa or cause-and-effect diagram, is specifically designed to systematically identify and display the root causes contributing to a particular problem or defect, making it the standard tool for root cause analysis of quality issues. Option A is wrong because a Scatter Diagram shows the correlation or relationship between two variables rather than identifying causal factors behind a problem. Option B is wrong because Control Charts are used to monitor a process over time to determine whether it is in statistical control, not to identify the root causes of defects. Option C is wrong because a Pareto Chart ranks defect types by frequency to prioritize which issues to address first, but it identifies what the problems are rather than why they occur.