diff --git a/app/Models/Activity.php b/app/Models/Activity.php
index cc4beb1..ff6d559 100644
--- a/app/Models/Activity.php
+++ b/app/Models/Activity.php
@@ -3,6 +3,7 @@
 namespace App\Models;
 
 use App\Models\AssignMaterial;
+use App\Models\ActivityProgressLog;
 use App\Models\AssignTools;
 use App\Models\ReportActivityMaterial;
 use Illuminate\Database\Eloquent\Model;
@@ -50,11 +51,17 @@ class Activity extends Model
 	public static function boot() {
 		parent::boot();
 
+		static::updating(function($data) {
+			$data->logPersentaseProgress();
+		});
+
 		static::updated(function($data) {
 			$data->updateBobot();
 			$data->updateCostPlanning();
-			$data->updatePersentaseProgress();
-			$data->updateCostActual();
+			if($data->persentase_bobot){
+				$data->updatePersentaseProgress();
+				$data->updateCostActual();
+			}
 		});
 
 		static::deleted(function($data) {
@@ -63,8 +70,10 @@ class Activity extends Model
 
 			$data->updateBobot(true);
 			$data->updateCostPlanning();
-			$data->updatePersentaseProgress();
-			$data->updateCostActual();
+			if($data->persentase_bobot){
+				$data->updatePersentaseProgress();
+				$data->updateCostActual();
+			}
 		});
 
 	}
@@ -138,6 +147,18 @@ class Activity extends Model
 		}
 	}
 
+	private function logPersentaseProgress()
+	{
+		ActivityProgressLog::create([
+			'version_gantt_id' => $this->version_gantt_id,
+			'activity_id' => request()->id,
+			'old_percentage' => $this->persentase_progress,
+			'new_percentage' => request()->persentase_progress,
+			'variance' => $this->persentase_progress - request()->persentase_progress,
+			'created_by'=> "system"
+		]);
+	}
+
 	public function getJobsDoneAttribute()
 	{
         if(!ReportActivityMaterial::where('activity_id', $this->id)->first())
diff --git a/app/Models/ActivityProgressLog.php b/app/Models/ActivityProgressLog.php
new file mode 100644
index 0000000..0746c92
--- /dev/null
+++ b/app/Models/ActivityProgressLog.php
@@ -0,0 +1,19 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class ActivityProgressLog extends Model
+{
+    protected $table = 'm_activity_progress_log';
+
+    const CREATED_AT = 'created_at';
+	const UPDATED_AT = null;
+
+    protected $fillable = [
+        'version_gantt_id', 'activity_id', 'old_percentage', 'new_percentage', 'variance',
+        'created_at', 'created_by'
+    ];
+
+}