Deliverables

The curriculum covers what an architect should know. This covers what an architect actually hands over: 55 artifacts, each with a worked example, a note on when it is worth producing, who reads it, and the ways it usually goes wrong. Filter by the artifact's type, the kind of engagement that calls for it, the stack or industry it is drawn against, or the audience it is written for.

Identify the deliverable → 42 diagrams, shown one at a time with the answer withheld. Nothing to submit.

9 of 55 deliverables shown.

flowchart LR
  sales["Sales<br/><i>quote, opportunity, discount</i>"]
  orders["Ordering<br/><i>order, line, fulfilment</i>"]
  billing["Billing<br/><i>invoice, credit note, dunning</i>"]
  ship["Shipping<br/><i>consignment, manifest</i>"]
  legacy["Legacy Mainframe<br/><i>account master</i>"]

  sales -->|"Customer / Supplier"| orders
  orders -->|"Customer / Supplier"| billing
  orders -->|"Published Language"| ship
  legacy -->|"Anti-Corruption Layer"| orders
  billing -.->|"Shared Kernel — party identity"| sales

Structural View

Bounded Context Map

The domain model's fault lines — which parts of the business have their own language, and what kind of relationship each pair of them has.

Bounded Contexts Design

flowchart TB
  gw["HTTP Gateway<br/><i>inbound</i>"]
  subgraph svc["Order API — inside the container"]
    direction TB
    ctrl["Order Controller<br/><i>validation, mapping</i>"]
    app["Order Application Service<br/><i>use cases, transactions</i>"]
    dom["Order Domain Model<br/><i>invariants, state rules</i>"]
    repo["Order Repository<br/><i>persistence port</i>"]
    pay["Payment Client<br/><i>anti-corruption adapter</i>"]
    out["Outbox Publisher"]
  end
  db[("PostgreSQL")]
  ext["Payment Provider"]
  bus[["Kafka"]]

  gw --> ctrl --> app
  app --> dom
  app --> repo --> db
  app --> pay --> ext
  app --> out --> db
  out -.->|"relay reads outbox"| bus

Structural View

Component Diagram

The inside of one runnable unit — its major code-level groupings, their responsibilities and what each one talks to.

C4 Model Design

flowchart TB
  cust(["Customer"])
  subgraph boundary["Order Management"]
    direction TB
    web["Web Application<br/><i>Next.js</i>"]
    api["Order API<br/><i>Java / Spring Boot</i>"]
    worker["Fulfilment Worker<br/><i>Java / Spring Boot</i>"]
    db[("Order Store<br/><i>PostgreSQL</i>")]
    queue[["Order Events<br/><i>Kafka</i>"]]
    cache[("Session Cache<br/><i>Redis</i>")]
  end
  pay["Payment Gateway"]

  cust -->|"HTTPS"| web
  web -->|"JSON over HTTPS"| api
  api -->|"reads and writes"| db
  api -->|"reads and writes"| cache
  api -->|"publishes"| queue
  queue -->|"consumes"| worker
  worker -->|"reads and writes"| db
  worker -->|"HTTPS"| pay

Structural View

Container Diagram

One level inside the system boundary — the separately deployable and runnable pieces, each named with the technology it is built on.

C4 Model Design

flowchart LR
  crm["CRM"]
  oms["Order Mgmt"]
  erp["ERP"]
  wms["WMS"]
  bill["Billing<br/><i>mainframe</i>"]
  dw[("Warehouse")]
  ptnr["Partner"]

  crm -->|"I-01 · REST · on demand"| oms
  oms -->|"I-02 · SFTP CSV · nightly"| erp
  oms -->|"I-03 · MQ · near real time"| wms
  wms -->|"I-04 · REST · on demand"| oms
  erp -->|"I-05 · flat file · nightly"| bill
  bill -->|"I-06 · DB link · nightly"| dw
  oms -->|"I-07 · CDC · continuous"| dw
  ptnr -->|"I-08 · AS2 EDI · hourly"| oms
  oms -->|"I-09 · AS2 EDI · hourly"| ptnr

Structural View

Integration Landscape Diagram

Every interface between systems, with its mechanism, direction, frequency and owner — the artifact that tells you what a migration will actually break.

Enterprise Integration Discovery

flowchart TB
  cust(["Customer"])
  agent(["Support Agent"])
  sys["Order Management<br/>the system being described"]
  pay["Payment Gateway<br/>external SaaS"]
  erp["ERP<br/>existing on-premises"]
  mail["Email Provider<br/>external SaaS"]
  crm["CRM<br/>external SaaS"]

  cust -->|"places and tracks orders"| sys
  agent -->|"amends and refunds orders"| sys
  sys -->|"authorises and captures"| pay
  sys -->|"posts financial documents"| erp
  sys -->|"sends confirmations"| mail
  sys -->|"reads account and entitlement"| crm

Structural View

System Context Diagram

The single box of your system surrounded by the people and external systems it talks to, and nothing about how it is built inside.

Context Diagrams Discovery

flowchart LR
  s1[("core_banking.accounts<br/><i>source</i>")]
  s2[("payments.transactions<br/><i>source</i>")]
  s3[("crm.customer<br/><i>source</i>")]

  j1{{"job: cdc_ingest<br/><i>hourly</i>"}}
  j2{{"job: conform_party<br/><i>daily 02:00</i>"}}
  j3{{"job: build_balances<br/><i>daily 03:15</i>"}}
  j4{{"job: reg_extract<br/><i>monthly</i>"}}

  r1[("raw.accounts")]
  r2[("raw.transactions")]
  c1[("clean.party")]
  c2[("clean.balance_daily")]
  o1[("report.capital_adequacy")]
  o2["Dashboard:<br/>Treasury Daily"]

  s1 --> j1 --> r1
  s2 --> j1 --> r2
  s3 --> j2
  r1 --> j2 --> c1
  r1 --> j3
  r2 --> j3 --> c2
  c1 --> j3
  c2 --> j4 --> o1
  c2 --> o2

Data View

Data Lineage Graph

Which dataset was derived from which, through what job — the artifact you produce when someone asks where a number came from.

Data Observability Run

erDiagram
  CUSTOMER ||--o{ ORDER : places
  CUSTOMER ||--o{ ADDRESS : has
  ORDER ||--|{ ORDER_LINE : contains
  ORDER }o--|| ADDRESS : "ships to"
  ORDER ||--o| PAYMENT : "settled by"
  PRODUCT ||--o{ ORDER_LINE : "appears in"
  PRODUCT }o--|| CATEGORY : "belongs to"

  CUSTOMER {
    uuid id PK
    string email UK
    string status
    timestamp created_at
  }
  ORDER {
    uuid id PK
    uuid customer_id FK
    uuid ship_to_id FK
    string status
    numeric total_minor
    string currency
  }
  ORDER_LINE {
    uuid id PK
    uuid order_id FK
    uuid product_id FK
    int quantity
    numeric unit_price_minor
  }
  PAYMENT {
    uuid id PK
    uuid order_id FK
    string provider_ref UK
    string state
  }

Data View

Entity Relationship Diagram

Entities, their attributes and the cardinality between them — where the notation on the end of each line is the actual content.

Relational Modelling Design

Governance Artifact

Architecture Decision Record

One page recording a single decision, its context, the options rejected and the consequences accepted — written when the decision is made, never after.

Architecture Decision Records Design

flowchart TB
  t1["T-7d · Dry run in staging<br/><i>full rehearsal, timed</i><br/>owner: Delivery"]
  t2["T-1d · Freeze changes · verify backups<br/>confirm rota and bridge<br/>owner: Ops"]
  t3["T-0 00:00 · Enable read-only on legacy<br/>owner: Ops"]
  t4["T-0 00:15 · Final delta migration<br/><i>est 90 min · checkpoint at 60</i><br/>owner: Data"]
  t5["T-0 01:45 · Reconcile counts + checksums<br/>owner: Data"]
  g1{"T-0 02:15 · GO / NO-GO<br/><i>criteria: 100% row match,<br/>0 critical defects, all owners present</i>"}
  t6["T-0 02:30 · Repoint DNS + feature flag<br/><i>TTL pre-lowered to 60s</i><br/>owner: Platform"]
  t7["T-0 02:45 · Smoke suite + 10 manual journeys<br/>owner: QA"]
  g2{"T-0 03:30 · Accept or roll back"}
  t8["T-0 03:30 · Open to 10% traffic<br/>owner: Platform"]
  t9["T-0 06:00 · 100% traffic<br/>owner: Platform"]
  t10["T+24h · Hypercare ends<br/>legacy kept read-only 30d"]
  rb(["ROLLBACK · revert DNS<br/>re-enable legacy writes<br/><i>est 20 min</i>"])
  pnr["POINT OF NO RETURN<br/><i>after first write to new system<br/>rollback needs reverse migration</i>"]

  t1 --> t2 --> t3 --> t4 --> t5 --> g1
  g1 -->|"no-go"| rb
  g1 -->|"go"| t6 --> t7 --> g2
  g2 -->|"roll back"| rb
  g2 -->|"accept"| t8 --> t9 --> t10
  t8 -.-> pnr

Planning Artifact

Cutover Plan

The hour-by-hour sequence of go-live, with owners, checkpoints, the rollback decision point and the moment rollback stops being possible.

Zero-Downtime Migration Build