diff --git a/app/Filament/Resources/CharacteristicApproverMasterResource.php b/app/Filament/Resources/CharacteristicApproverMasterResource.php
index 36e7f11..4c3bf55 100644
--- a/app/Filament/Resources/CharacteristicApproverMasterResource.php
+++ b/app/Filament/Resources/CharacteristicApproverMasterResource.php
@@ -6,25 +6,24 @@ use App\Filament\Exports\CharacteristicApproverMasterExporter;
 use App\Filament\Imports\CharacteristicApproverMasterImporter;
 use App\Filament\Resources\CharacteristicApproverMasterResource\Pages;
 use App\Models\CharacteristicApproverMaster;
-use App\Models\Item;
 use App\Models\Machine;
 use App\Models\Plant;
 use Filament\Facades\Filament;
 use Filament\Forms;
+use Filament\Forms\Components\DateTimePicker;
 use Filament\Forms\Components\Section;
+use Filament\Forms\Components\Select;
+use Filament\Forms\Components\TextInput;
 use Filament\Forms\Form;
 use Filament\Resources\Resource;
 use Filament\Tables;
 use Filament\Tables\Actions\ExportAction;
 use Filament\Tables\Actions\ImportAction;
+use Filament\Tables\Filters\Filter;
 use Filament\Tables\Table;
 use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Database\Eloquent\SoftDeletingScope;
 use Illuminate\Validation\Rule;
-use Filament\Forms\Components\DateTimePicker;
-use Filament\Forms\Components\Select;
-use Filament\Forms\Components\TextInput;
-use Filament\Tables\Filters\Filter;
 
 class CharacteristicApproverMasterResource extends Resource
 {
@@ -34,6 +33,8 @@ class CharacteristicApproverMasterResource extends Resource
 
     protected static ?string $navigationGroup = 'Laser Marking';
 
+    protected static ?int $navigationSort = 2;
+
     public static function form(Form $form): Form
     {
         return $form
@@ -224,7 +225,8 @@ class CharacteristicApproverMasterResource extends Resource
                                 Forms\Components\TextInput::make('duration2')
                                     ->label('Duration (HH.MM)')
                                     ->reactive()
-                                    ->length(4)
+                                    ->minLength(4)
+                                    ->maxLength(5)
                                     ->regex('/^([0-9]|0[0-9]|1[0-9]|2[0-3])\.(0[0-9]|[1-5][0-9])$/')
                                     ->validationMessages([
                                         'regex' => 'Duration must be HH.MM format (example: 00.00 - 23.59)',
@@ -256,7 +258,8 @@ class CharacteristicApproverMasterResource extends Resource
                                 Forms\Components\TextInput::make('duration3')
                                     ->label('Duration (HH.MM)')
                                     ->reactive()
-                                    ->length(4)
+                                    ->minLength(4)
+                                    ->maxLength(5)
                                     ->regex('/^([0-9]|0[0-9]|1[0-9]|2[0-3])\.(0[0-9]|[1-5][0-9])$/')
                                     ->validationMessages([
                                         'regex' => 'Duration must be HH.MM format (example: 00.00 - 23.59)',