diff --git a/addons/mrp/models/mrp_workorder.py b/addons/mrp/models/mrp_workorder.py
index a442c8836d3..a4fe11e2fa9 100644
--- a/addons/mrp/models/mrp_workorder.py
+++ b/addons/mrp/models/mrp_workorder.py
@@ -613,15 +613,16 @@ class MrpWorkorder(models.Model):
         if self.state in ('done', 'cancel'):
             return True
 
+        if self._should_start_timer():
+            self.env['mrp.workcenter.productivity'].create(
+                self._prepare_timeline_vals(self.duration, datetime.now())
+            )
+
         if self.product_tracking == 'serial':
             self.qty_producing = 1.0
         elif self.qty_producing == 0:
             self.qty_producing = self.qty_remaining
 
-        if self._should_start_timer():
-            self.env['mrp.workcenter.productivity'].create(
-                self._prepare_timeline_vals(self.duration, datetime.now())
-            )
         if self.production_id.state != 'progress':
             self.production_id.write({
                 'date_start': datetime.now(),