diff --git a/app/Models/Plant.php b/app/Models/Plant.php
index 3e35d63..fb4566e 100644
--- a/app/Models/Plant.php
+++ b/app/Models/Plant.php
@@ -122,4 +122,9 @@ class Plant extends Model
     {
         return $this->hasMany(Machine::class, 'plant_id', 'id');
     }
+
+    public function productCharacteristicsMasters()
+    {
+        return $this->hasMany(ProductCharacteristicsMaster::class, 'plant_id', 'id');
+    }
 }