Self-Checkout · SCO / Customer-Operated Checkout¶

Customer scans and bags items at a self-checkout kiosk, receives applicable promotions, settles payment using supported tender types, and exits without a staffed till interaction unless an exception requires assistance.


Domains	`order` · `payment` · `promotion` · `store`
Actors	`customer` · `store-associate`
Process	Self-Checkout
Capabilities	7
Steps	8
Events	11
Lifecycles	6
Min UCMI	`2.7`

⚙️ Step-by-Step Flow¶

#	Step	Actor	Lifecycle	State Change	Event
1	Start kiosk basket	customer	`basket-lifecycle`	→ open	`basket-created`
2	Scan items	customer	`basket-line-lifecycle`	→ added	`basket-updated`
3	Handle kiosk exceptions	store-associate	`till-session-lifecycle`	open → assisted	`inventory-checked`
4	Apply promotions	system	`promotion-lifecycle`	eligible → applied	`promotion-applied`
5	Start checkout	customer	`basket-lifecycle`	open → locked	`basket-checkout-started`
6	Authorize payment	customer	`payment-lifecycle`	pending → authorised	`payment-authorized`
7	Capture payment	system	`payment-lifecycle`	authorised → captured	`payment-captured`
8	Create order and issue receipt	system	`order-lifecycle`	draft → completed	`order-created` · `order-confirmed` · `basket-converted` · `receipt-issued`

⚡ Event Sequence¶

basket-created → basket-updated → inventory-checked → promotion-applied → basket-checkout-started → payment-authorized → payment-captured → order-created → order-confirmed → basket-converted → receipt-issued

🔄 Lifecycles Involved¶

🧩 Capabilities Required¶

Capability
`basket-management`	Basket Management
`catalogue-management`	Catalogue Management
`promotions`	Promotions
`checkout`	Checkout
`payment-processing`	Payment Processing
`order-management`	Order Management
`store-operations`	Store Operations

🖥️ Application Coverage¶

Applications that implement the capabilities required by this scenario.

Capability	Implementing Applications
`basket-management`	POS · eCommerce Platform · Clienteling App
`catalogue-management`	eCommerce Platform
`promotions`	Promotion Engine
`checkout`	POS · eCommerce Platform · Associate Workspace
`payment-processing`	POS · Payment Hub
`order-management`	OMS · eCommerce Platform
`store-operations`	POS

📊 Readiness by Profile¶

Capability readiness across assessment profiles.

Profile	Capabilities Met	Avg Score	Ready?
Acme Electronics	7/7	2.1	❌
BuildPro Trade	7/7	2.6	❌
Flash Delivery	7/7	2.9	✅
Luxe Maison	5/7	2.4	❌
Metro Fresh Group	7/7	2.9	✅
Stella Fashion Group	7/7	2.9	✅
Reference Tier 2 Non-food Retailer	7/7	3.0	✅

✅ Preconditions¶

Self-checkout kiosks are available and connected to catalogue and payment services
Store policy allows self-service checkout for the basket contents
Exception support is available on the shop floor

🎯 Success Criteria¶

Customer completes the transaction without joining a staffed till queue
Promotions are applied consistently with staffed checkout
Supported tender types complete successfully at the kiosk
Receipt is issued and transaction is closed in the store control systems

⚠️ Failure Modes¶

Barcode, weight, or age-verification exception blocks customer progress
Payment device or cash acceptor becomes unavailable mid-transaction
Promotion engine delay causes customer-visible total mismatch
Receipt issuance fails after payment capture

UCMI Requirements¶

Minimum UCMI Score: 2.7

Capability	Minimum Level
`basket-management`	🟠 2
`catalogue-management`	🟠 2
`promotions`	🟠 2
`checkout`	🟠 2
`payment-processing`	🟠 2
`order-management`	🟠 2
`store-operations`	🟠 2

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