The document discusses tools that can be used in the 'Plan' step of the PDSA cycle to define problems and develop goals to test changes. These include root cause analysis techniques like 5 Whys, brainstorming, and fishbone diagrams to identify the underlying causes of issues. The 5 Whys technique involves asking "why" multiple times to get to the root cause. Brainstorming generates many ideas, while fishbone diagrams provide a structured way to identify potential causes. SMART goals are also discussed as a tool to help develop specific, measurable, attainable, relevant, and time-bound goals for testing changes.