# Plain vector RAG against GraphRAG: is every supporting document in the context?

corpus: 35 chunks (one document each); 9 questions; evidence = the documents that together hold every fact needed
vector: Neo4jVectorStore, top-k chunks.  graph: link spans (cosine >= 0.80), walk <= 3 hops, keep the 6 best-ranked paths, take the chunks that stated their edges

id  hops | vector k4 vector k8 | graph     chunks  | question
Q1  1    | yes       yes       | yes       6       | Who leads the Fulfilment Team?
Q2  2    | yes       yes       | yes       5       | Who leads the team that owns the Payments Gateway?
Q3  2    | NO        NO        | yes       4       | Which team owns the root cause of INC-2041?
Q4  3    | NO        yes       | yes       5       | Who does the leader of the team that owns the Payments Gateway report to?
Q5  3    | NO        yes       | yes       4       | Where is the company that hosts the database behind the Ledger Service located?
Q6  3    | NO        yes       | NO        5       | Who leads the teams that own the services the Checkout Service depends on?
Q7  3    | NO        NO        | NO        5       | Which services stop working if the Orders Database goes down?
Q8  2    | NO        NO        | yes       6       | Which incidents affected services that the Checkout Service depends on directly?
Q9  3    | NO        NO        | yes       4       | Who leads the team that owns the service INC-2057 affected?

complete evidence: vector k=4 2/9, vector k=8 5/9, graph 7/9 (graph context averaged 4.9 chunks; vector k=8 is always 8)
  1-hop questions (1): vector k=4 1, vector k=8 1, graph 1
  2-hop questions (3): vector k=4 1, vector k=8 1, graph 3
  3-hop questions (5): vector k=4 0, vector k=8 3, graph 3

--- what each retriever missed ---
Q1  vector k=8 missing []   graph missing []
Q2  vector k=8 missing []   graph missing []
Q3  vector k=8 missing [db-orders]   graph missing []
Q4  vector k=8 missing []   graph missing []
Q5  vector k=8 missing []   graph missing []
Q6  vector k=8 missing []   graph missing [team-payments]
Q7  vector k=8 missing [svc-payments-gateway]   graph missing [svc-checkout, svc-payments-gateway]
Q8  vector k=8 missing [inc-2057]   graph missing []
Q9  vector k=8 missing [team-fulfilment, svc-inventory]   graph missing []