> For the complete documentation index, see [llms.txt](https://docs.docbits.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.docbits.com/chinese/guan-li-yu-she-zhi/settings/document-processing/decision-trees/collect-sum-policy.md).

# Collect (sum) 策略

此策略会收集所有匹配的规则并对结果求和。此策略仅适用于 **Return Type Value**。

**示例：**

| 规则 | 条件                   | 返回值 |
| -- | -------------------- | --- |
| 1  | Total Amount <= 1000 | 1   |
| 2  | Total Amount <= 2000 | 2   |
| 3  | Total Amount <= 3000 | 3   |
| 4  | Total Amount <= 4000 | 4   |
| 5  | Total Amount <= 5000 | 5   |

对于输入值 **Total Amount = 2500**，规则的评估结果如下：

* **规则 1**：Total Amount <= 1000（不匹配）
* **规则 2**：Total Amount <= 2000（不匹配）
* **规则 3**：Total Amount <= 3000（匹配，返回值 = 3）
* **规则 4**：Total Amount <= 4000（匹配，返回值 = 4）
* **规则 5**：Total Amount <= 5000（匹配，返回值 = 5）

由于应用了 **Collect (sum)** 策略，我们将匹配规则的 **返回值** 相加，分别为 **3、4、5**。

**将这些值相加**：

* 5 + 4 + 3 = **12**

因此，决策树返回的结果为 **12**，即所有匹配规则的返回值之和。


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