diff --git a/issues/models.py b/issues/models.py
index 283d9d1..ca17848 100644
--- a/issues/models.py
+++ b/issues/models.py
@@ -53,4 +53,41 @@ class Message(models.Model):
     text = models.TextField()
 
     def __str__(self):
-        return f"{self.identifier}: {self.text[:30]}"
\ No newline at end of file
+        return f"{self.identifier}: {self.text[:30]}"
+
+class Plant(models.Model):
+    """Справочник заводов"""
+    name = models.CharField(max_length=255, unique=True)
+
+    def __str__(self):
+        return self.name
+
+
+class ProductionLine(models.Model):
+    """Справочник производственных линий"""
+    name = models.CharField(max_length=255, unique=True)
+    plant = models.ForeignKey(Plant, on_delete=models.CASCADE, related_name="lines")
+
+    def __str__(self):
+        return f"{self.plant.name} - {self.name}"
+
+
+class ProductionZone(models.Model):
+    """Справочник производственных зон"""
+    name = models.CharField(max_length=255)
+    line = models.ForeignKey(ProductionLine, on_delete=models.CASCADE, related_name="zones")
+
+    class Meta:
+        unique_together = ('name', 'line')  # Зона уникальна в пределах линии
+
+    def __str__(self):
+        return f"{self.line.name} - {self.name}"
+
+
+class DowntimeReason(models.Model):
+    """Справочник причин простоев"""
+    name = models.CharField(max_length=255, unique=True)
+    description = models.TextField(blank=True)
+
+    def __str__(self):
+        return self.name