Explore Alexandria · Optio Alexandria

2 use cases: 2 still miss something, and 1 things on the map have no use case.

Use case	Concept Logical payment	Concept Order	Concept Processor confirmation	Concept Refund
Pay for the €100 lamp 1 missing	W	R	W	T
Refund the unavailable lamp 1 missing	R	T	W	W
Covered by	2	2	2	2

W Writes to it or sends it work R Reads from it T Passes a part it lives in

Notes

Explore Alexandria 4 of 6

Illustrative payment system · authored sample knowledge

Could Try again charge twice?

This alternative changes the timeout branch. Compare it with its base, then open the recorded decision explaining why the current design retains the payment.

Keep the reason beside the change it informs.

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Pay for the €100 lamp

Illustrative system · authored sample records. Mira buys a EUR 100.00 lamp, order ord-1042. Payment pay-1001 initially has an unknown outcome after checkout times out.

Actor: Mira · customer
Trigger: Mira chooses Pay for the €100 lamp.
Goal: Pay once and understand whether the shop can fulfil the order.

What is missing

No load scenario puts demand on its connections

What it has

Trigger and goal
Steps on the map
Data named
Failure path

Ask your agent

In Alexandria, complete the use case “Pay for the €100 lamp” (id uc-pay-order). Add or extend a load scenario with demand on its first interaction. Read it with settings_get, change it with settings_apply, and add interactions with drafts_apply.