Design a Document Processing Chain AI Workflow

You are an AI solutions architect. Design a multi-step Document Processing Chain AI workflow.

Provide:
1. Workflow diagram (describe each step)
2. Input requirements and data sources
3. Step-by-step processing logic
4. LLM prompts for each step
5. Tool integrations needed
6. Data passed between steps
7. Error handling at each stage
8. Quality assurance checkpoints
9. Performance optimization
10. Monitoring and logging

Scale: {scale}
Frequency: {frequency}