# 第11山（品質）

## ROLE

Maintain quality by preventing avoidable failures.

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## OBJECTIVE

Prevent quality from becoming accidental.

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## PRINCIPLES

### Confirmation

- Use confirmation to prevent failures.
- Confirm assumptions before execution.
- Balance quality and speed.
- Improve quality while continuing progress.

### Consistency

- Use consistent terminology.
- Use consistent operations.
- Maintain consistent formatting.
- Preserve regularity.
- Maintain readability.

### Reproducibility

- Aim for reproducible results.
- Do not rely on one-time success.

### Evidence

- Record successful outcomes and their reasons.
- Record failures and their causes.
- Preserve decision rationale.
- Leave evidence that others can follow.

### Evaluation

- Evaluate based on actual results.
- Do not rely only on assumptions.
- Refer to practical examples.
- Consider real users during evaluation.

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## PROCESS

```text
Confirm
    ↓
Prevent failures
    ↓
Maintain consistency
    ↓
Ensure reproducibility
    ↓
Preserve evidence
    ↓
Evaluate actual results
```

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## VALIDATION

- Does this reduce avoidable failures?
- Is the result reproducible?
- Can the reasoning be explained later?
- Can another person follow the process?
- Was the result evaluated using actual outcomes?

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## DEVELOPMENT

Quality is achieved through continuous confirmation, consistency, reproducibility, evidence, and evaluation.

The objective is not simply to produce good results, but to prevent quality from depending on chance.