diff --git a/inquiry-api/jeecg-module-inquiry/src/main/java/org/jeecg/modules/inquiry/domain/EventExceptionRule.java b/inquiry-api/jeecg-module-inquiry/src/main/java/org/jeecg/modules/inquiry/domain/EventExceptionRule.java
new file mode 100644
index 0000000..c47d932
--- /dev/null
+++ b/inquiry-api/jeecg-module-inquiry/src/main/java/org/jeecg/modules/inquiry/domain/EventExceptionRule.java
@@ -0,0 +1,109 @@
+package org.jeecg.modules.inquiry.domain;
+
+import org.apache.commons.lang3.StringUtils;
+
+import java.util.Arrays;
+import java.util.Date;
+import java.util.LinkedHashSet;
+import java.util.Set;
+
+/**
+ * 事件异常纯规则：摘要拼接、哪些六态还盯超时、换等待种类才重置计时。
+ * <p>
+ * 不写库、不发企微。工单六态不因事件异常改变。
+ */
+public final class EventExceptionRule {
+
+    private EventExceptionRule() {
+    }
+
+    /**
+     * 多次异常拼在一起；同一类型不重复。
+     */
+    public static String appendSummary(String existing, String type) {
+        String add = StringUtils.trimToEmpty(type);
+        if (add.isEmpty()) {
+            return StringUtils.trimToEmpty(existing);
+        }
+        String cur = StringUtils.trimToEmpty(existing);
+        if (cur.isEmpty() || "-".equals(cur)) {
+            return add;
+        }
+        Set<String> parts = new LinkedHashSet<String>(Arrays.asList(cur.split("；")));
+        if (parts.contains(add)) {
+            return cur;
+        }
+        parts.add(add);
+        StringBuilder out = new StringBuilder();
+        for (String p : parts) {
+            String one = StringUtils.trimToEmpty(p);
+            if (one.isEmpty()) {
+                continue;
+            }
+            if (out.length() > 0) {
+                out.append('；');
+            }
+            out.append(one);
+        }
+        return out.toString();
+    }
+
+    /**
+     * 已成交 / 已关闭 / 转人工不再盯；未成交仍可能在等原因。
+     */
+    public static boolean isWatchable(String status) {
+        if (StringUtils.isBlank(status)) {
+            return false;
+        }
+        if (TicketStatuses.DEAL.equals(status)
+                || TicketStatuses.CLOSED.equals(status)
+                || TicketStatuses.HANDOFF.equals(status)) {
+            return false;
+        }
+        return TicketStatuses.isKnown(status);
+    }
+
+    /**
+     * 等待种类变了才重置起点；同一种类重复 start 不改已过时间。
+     */
+    public static boolean shouldResetClock(String currentKind, String newKind) {
+        String cur = StringUtils.trimToEmpty(currentKind);
+        String next = StringUtils.trimToEmpty(newKind);
+        if (next.isEmpty()) {
+            return false;
+        }
+        return !cur.equals(next);
+    }
+
+    /**
+     * 开始等待后的三列新值。
+     */
+    public static EventWaitState applyStart(String currentKind, Date started, Integer alerted,
+                                            String newKind, Date now) {
+        String next = StringUtils.trimToEmpty(newKind);
+        if (next.isEmpty()) {
+            return new EventWaitState(currentKind, started, alerted);
+        }
+        if (!shouldResetClock(currentKind, next)) {
+            Date keep = started != null ? started : now;
+            int flag = alerted == null ? 0 : alerted.intValue();
+            return new EventWaitState(next, keep, flag);
+        }
+        return new EventWaitState(next, now, 0);
+    }
+
+    /**
+     * 当前等待三列。
+     */
+    public static final class EventWaitState {
+        public final String kind;
+        public final Date startedAt;
+        public final int alerted;
+
+        public EventWaitState(String kind, Date startedAt, int alerted) {
+            this.kind = kind;
+            this.startedAt = startedAt;
+            this.alerted = alerted;
+        }
+    }
+}
diff --git a/inquiry-api/jeecg-module-inquiry/src/test/java/org/jeecg/modules/inquiry/domain/EventExceptionRuleTest.java b/inquiry-api/jeecg-module-inquiry/src/test/java/org/jeecg/modules/inquiry/domain/EventExceptionRuleTest.java
new file mode 100644
index 0000000..bacc542
--- /dev/null
+++ b/inquiry-api/jeecg-module-inquiry/src/test/java/org/jeecg/modules/inquiry/domain/EventExceptionRuleTest.java
@@ -0,0 +1,53 @@
+package org.jeecg.modules.inquiry.domain;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * 事件异常纯规则：摘要拼接、可盯状态、换等待种类才重置计时。
+ */
+public class EventExceptionRuleTest {
+
+    @Test
+    public void appendKeepsBothTypes() {
+        assertEquals("航线响应超时", EventExceptionRule.appendSummary("", "航线响应超时"));
+        assertEquals("航线响应超时；销售响应超时",
+                EventExceptionRule.appendSummary("航线响应超时", "销售响应超时"));
+        assertEquals("航线响应超时", EventExceptionRule.appendSummary("航线响应超时", "航线响应超时"));
+    }
+
+    @Test
+    public void lostIsWatchableHandoffIsNot() {
+        assertTrue(EventExceptionRule.isWatchable("未成交"));
+        assertTrue(EventExceptionRule.isWatchable(TicketStatuses.INQUIRING));
+        assertFalse(EventExceptionRule.isWatchable("已成交"));
+        assertFalse(EventExceptionRule.isWatchable("已关闭"));
+        assertFalse(EventExceptionRule.isWatchable("转人工"));
+    }
+
+    @Test
+    public void sameKindDoesNotResetClock() {
+        assertFalse(EventExceptionRule.shouldResetClock("air_quote", "air_quote"));
+        assertTrue(EventExceptionRule.shouldResetClock("air_quote", "adopt"));
+        assertTrue(EventExceptionRule.shouldResetClock("", "product_quote"));
+    }
+
+    @Test
+    public void applyStartKeepsClockOnSameKind() {
+        java.util.Date first = new java.util.Date(1_000L);
+        java.util.Date now = new java.util.Date(2_000L);
+        EventExceptionRule.EventWaitState keep = EventExceptionRule.applyStart(
+                "air_quote", first, 1, "air_quote", now);
+        assertEquals("air_quote", keep.kind);
+        assertEquals(first, keep.startedAt);
+        assertEquals(1, keep.alerted);
+        EventExceptionRule.EventWaitState reset = EventExceptionRule.applyStart(
+                "air_quote", first, 1, "adopt", now);
+        assertEquals("adopt", reset.kind);
+        assertEquals(now, reset.startedAt);
+        assertEquals(0, reset.alerted);
+    }
+}