Examples and Practice: Chunk Size and Overlap

Worked Practice

1. Write one paragraph explaining Chunk Size and Overlap to a beginner.
2. Draw the smallest diagram that shows input, transformation, output, and failure mode.
3. Build or outline a tiny artifact connected to: Build a document ingestion pipeline.
4. Measure it with: Track parsed documents, rejected content, chunks, metadata, and freshness.
5. Add one failure case to your learning log.

Mini Project Drill

Create a file named notes/chunk-size-and-overlap.md in your project workspace. Include:

• the problem Chunk Size and Overlap solves
• the simplest implementation or design
• the measurement you used
• one example input
• one expected output
• one failure case
• one decision you would make from the result

Check Your Understanding

Question	What a strong answer includes
Why does Chunk Size and Overlap matter?	It connects to an evaluated rag or ai workflow application with documents, prompts, tests, logs, latency, cost, and failure analysis. and names a practical risk.
How would you test it?	It uses a small repeatable case and a measurable expected result.
What breaks first?	It names a specific failure mode, not only "the model is bad".
When should you move on?	When the artifact works on a realistic case and one edge case.

Stretch Exercise

Revisit the same drill after finishing the next part. Update the note with what changed. This is how isolated concepts become connected system judgment.

Return to 5.3.2 Chunk Size and Overlap.