diff --git a/database/migrations/2026_01_09_141348_add_duration1_duration2_duration3_columns_to_characteristic_approver_masters.php b/database/migrations/2026_01_09_141348_add_duration1_duration2_duration3_columns_to_characteristic_approver_masters.php
new file mode 100644
index 0000000..e3eeb03
--- /dev/null
+++ b/database/migrations/2026_01_09_141348_add_duration1_duration2_duration3_columns_to_characteristic_approver_masters.php
@@ -0,0 +1,45 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        $sql1 = <<<'SQL'
+        ALTER TABLE characteristic_approver_masters
+        ADD COLUMN duration1 NUMERIC(4, 2) DEFAULT 0
+        SQL;
+
+        DB::statement($sql1);
+
+        $sql2 = <<<'SQL'
+        ALTER TABLE characteristic_approver_masters
+        ADD COLUMN duration2 NUMERIC(4, 2) DEFAULT 0
+        SQL;
+
+        DB::statement($sql2);
+
+        $sql3 = <<<'SQL'
+        ALTER TABLE characteristic_approver_masters
+        ADD COLUMN duration3 NUMERIC(4, 2) DEFAULT 0
+        SQL;
+
+        DB::statement($sql3);
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        // Schema::table('characteristic_approver_masters', function (Blueprint $table) {
+        //     //
+        // });
+    }
+};