情境
A fleet maintenance garage needs to track vehicles, customers, work orders, assigned mechanics, services and parts used, and invoicing.
這張圖裡有什麼
看懂背後的決策。
01
Model WorkOrder as an aggregate root with composition to ServiceItem and PartItem
02
Use interface Billable for items that contribute to invoice total
03
Represent work order status as an enumeration
When designing a garage management system or service workflow tracking vehicle repairs and billing.