Page 5 of 8~96 min topic

Inside RAG — the pipeline

Anticipate failure modes

Name failures by their mechanism in RAG pipeline stages on the vacation-policy Q&A, not with a generic hallucination label.

~12 min this pageFailure modes

1Learn the idea

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Response design

See it

RAG in one glance
  1. QuestionYour ask
  2. RetrieveFind docs
  3. StuffAdd to prompt
  4. AnswerWith evidence

Look up trusted notes first — then answer with that context

For each severe RAG pipeline stages failure on the vacation-policy Q&A, define stop condition, safe state, owner, and lasting prevention. Rollback only works if prior prompts, indexes, and models remain available. “Send to a human” needs queue capacity and context—not just a button name.

Run one tabletop on the vacation-policy Q&A for RAG pipeline stages: inject a defect, verify detection, contain, recover, and keep the blameless trace.

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Make it operational

After the tabletop, store the injected RAG pipeline stages defect for the vacation-policy Q&A as a regression fixture. If the same failure later reaches users silently, your detection story was aspirational. Detection without a fixture tends to rot for RAG pipeline stages.

Also pin one numeric memory from this RAG pipeline stages chapter: if 18 of 20 test questions retrieve at least one relevant chunk in top 5, recall@5 = 18/20 = 0.90 That number is not decoration; it is a template for how claims about RAG pipeline stages on the vacation-policy Q&A should look in design docs. Scoped specifically to RAG pipeline stages / vacation-policy Q&A / failure-modes.

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Common mix-ups

People confuse RAG pipeline stages with neighboring buzzwords when debugging the vacation-policy Q&A. Before changing prompts, ask whether the broken stage was evidence gathering, the RAG pipeline stages judgment itself, validation, or the product action. Fixing the wrong stage creates folklore (“we tried RAG pipeline stages and it failed”) that blocks the next team on the vacation-policy Q&A. Scoped specifically to RAG pipeline stages / vacation-policy Q&A / failure-modes.

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Rehearsal (rag-pipeline-steps/failure-modes)

Write a five-line artifact for this page: goal, inputs, check, owner, stop rule. Invent one fluent failure that the check would catch. Keep details specific to rag pipeline steps rather than generic AI advice.

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Rehearsal (rag-pipeline-steps/failure-modes)

Write a five-line artifact for this page: goal, inputs, check, owner, stop rule. Invent one fluent failure that the check would catch. Keep details specific to rag pipeline steps rather than generic AI advice.

Read

Rehearsal (rag-pipeline-steps/failure-modes)

Write a five-line artifact for this page: goal, inputs, check, owner, stop rule. Invent one fluent failure that the check would catch. Keep details specific to rag pipeline steps rather than generic AI advice.

Go deeper

Before you start

Why this matters

Invent an incident for the vacation-policy Q&A involving RAG pipeline stages. What earliest signal should fire before users complain?

Missed chunk

Detect with right policy never retrieved. Respond by fix ingest/chunk; inspect ranked list.

Distractor packing

Detect with k too high. Respond by rerank; shrink k.

Unsupported synthesis

Detect with joins two docs wrongly. Respond by claim-level citation checks.

Stale index

Detect with old vacation rule cited. Respond by freshness SLO + versions.

In the wild

See how this idea shows up as a product and a company — then come back to the lesson. Skills transfer across vendors.

Check your understanding

Page assessment

Answer from memory. Completion is saved from this evidence, not from opening the next page.

1. What is one idea from this page you would apply, and what evidence would you check?

All responses are required.