What is a use case scenario vs use case flow?

Question

Accepted Answer

**Scenario** — specific instance. **Flow** — sequence of steps.

**Use case flow:**
- General description.
- Main flow (happy path).
- Alternative flows.
- Exception flows.

**Scenario:**
- Specific example.
- Concrete data.
- One instance of flow.

**Example:**
```
Use Case: Place Order
Main Flow:
1. User adds items to cart
2. User proceeds to checkout
3. System processes payment
4. Order confirmed

Scenario (specific instance):
John adds iPhone to cart
John enters credit card 1234-5678-9012-3456
System charges $999
John receives confirmation #12345
```

**Key differences:**
- **Flow** — general process.
- **Scenario** — specific example.

Business Analyst: What is a use case scenario vs use case flow?