Curious to hear thought on starting with 1 use case (Training), and leveraging the content for multiple use cases.  We are seeing more of this where there is a single use case, but quickly expands.  Example:

• Start at Training

THEN, modify the same project and reuse for:

• Overview
• Sales / Leadership Demo
• Installation
• Start-up
• QA
• Service
• Planned Maintenance
• Engineering Design

Love to hear your stories of how your use case grew simply by modifying the existing instructions!