diff --git a/app/Filament/Resources/ProductCharacteristicsMasterResource.php b/app/Filament/Resources/ProductCharacteristicsMasterResource.php
index 947fc67..7bb818d 100644
--- a/app/Filament/Resources/ProductCharacteristicsMasterResource.php
+++ b/app/Filament/Resources/ProductCharacteristicsMasterResource.php
@@ -221,6 +221,12 @@ class ProductCharacteristicsMasterResource extends Resource
                     ->afterStateUpdated(function ($state, callable $set) {
                         $set('updated_by', Filament::auth()->user()?->name);
                     }),
+                Forms\Components\TextInput::make('category')
+                    ->label('Category')
+                    ->reactive()
+                    ->afterStateUpdated(function ($state, callable $set) {
+                        $set('updated_by', Filament::auth()->user()?->name);
+                    }),
                 Forms\Components\Select::make('inspection_type')
                     ->label('Inspection Type')
                     ->searchable()
@@ -351,6 +357,11 @@ class ProductCharacteristicsMasterResource extends Resource
                     ->alignCenter()
                     ->searchable()
                     ->sortable(),
+                Tables\Columns\TextColumn::make('category')
+                    ->label('Category')
+                    ->alignCenter()
+                    ->searchable()
+                    ->sortable(),
                 Tables\Columns\TextColumn::make('line.name')
                     ->label('Line Name')
                     ->alignCenter()
diff --git a/app/Models/ProductCharacteristicsMaster.php b/app/Models/ProductCharacteristicsMaster.php
index 931c04c..124040b 100644
--- a/app/Models/ProductCharacteristicsMaster.php
+++ b/app/Models/ProductCharacteristicsMaster.php
@@ -18,6 +18,7 @@ class ProductCharacteristicsMaster extends Model
         'machine_id',
         'characteristics_type',
         'name',
+        'category',
         'inspection_type',
         'lower',
         'upper',
diff --git a/database/migrations/2026_04_21_154805_add_category_to_product_characteristics_masters.php b/database/migrations/2026_04_21_154805_add_category_to_product_characteristics_masters.php
new file mode 100644
index 0000000..6e0493a
--- /dev/null
+++ b/database/migrations/2026_04_21_154805_add_category_to_product_characteristics_masters.php
@@ -0,0 +1,31 @@
+<?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
+    {
+        $sql1 = <<<'SQL'
+        ALTER TABLE product_characteristics_masters
+        ADD COLUMN category TEXT DEFAULT NULL
+        SQL;
+
+        DB::statement($sql1);
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        // Schema::table('product_characteristics_masters', function (Blueprint $table) {
+        //     //
+        // });
+    }
+};