diff --git a/app/Filament/Imports/CharacteristicValueImporter.php b/app/Filament/Imports/CharacteristicValueImporter.php
index 405888b..583552b 100644
--- a/app/Filament/Imports/CharacteristicValueImporter.php
+++ b/app/Filament/Imports/CharacteristicValueImporter.php
@@ -3,9 +3,16 @@
 namespace App\Filament\Imports;
 
 use App\Models\CharacteristicValue;
+use App\Models\Item;
+use App\Models\Line;
+use App\Models\Machine;
+use App\Models\Plant;
+use App\Models\ProcessOrder;
+use Filament\Actions\Imports\Exceptions\RowImportFailedException;
 use Filament\Actions\Imports\ImportColumn;
 use Filament\Actions\Imports\Importer;
 use Filament\Actions\Imports\Models\Import;
+use Str;
 
 class CharacteristicValueImporter extends Importer
 {
@@ -16,25 +23,52 @@ class CharacteristicValueImporter extends Importer
         return [
             ImportColumn::make('plant')
                 ->requiredMapping()
-                ->relationship()
+                ->exampleHeader('Plant Code')
+                ->example('1000')
+                ->label('Plant Code')
+                ->relationship(resolveUsing: 'code')
                 ->rules(['required']),
             ImportColumn::make('line')
                 ->requiredMapping()
-                ->relationship()
+                ->exampleHeader('Line Name')
+                ->example('4 inch pump line')
+                ->label('Line Name')
+                ->relationship(resolveUsing: 'name')
                 ->rules(['required']),
             ImportColumn::make('item')
                 ->requiredMapping()
-                ->relationship()
+                ->exampleHeader('Item Code')
+                ->example('123456')
+                ->label('Item Code')
+                ->relationship(resolveUsing: 'code')
                 ->rules(['required']),
             ImportColumn::make('machine')
                 ->requiredMapping()
-                ->relationship()
+                ->exampleHeader('Work Center')
+                ->example('RMGS09745')
+                ->label('Work Center')
+                ->relationship(resolveUsing: 'work_center')
                 ->rules(['required']),
-            ImportColumn::make('process_order'),
-            ImportColumn::make('coil_number'),
-            ImportColumn::make('status'),
-            ImportColumn::make('created_by'),
-            ImportColumn::make('updated_by'),
+            ImportColumn::make('process_order')
+                ->requiredMapping()
+                ->exampleHeader('Process Order')
+                ->example('23455256352')
+                ->label('Process Order'),
+            ImportColumn::make('coil_number')
+                ->requiredMapping()
+                ->exampleHeader('Coil Number')
+                ->example('0')
+                ->label('Coil Number'),
+            ImportColumn::make('status')
+                ->requiredMapping()
+                ->exampleHeader('Status')
+                ->example('Ok')
+                ->label('Status'),
+            ImportColumn::make('created_by')
+                ->requiredMapping()
+                ->exampleHeader('Created By')
+                ->example('RAW01234')
+                ->label('Created By'),
         ];
     }
 
@@ -45,15 +79,180 @@ class CharacteristicValueImporter extends Importer
         //     'email' => $this->data['email'],
         // ]);
 
-        return new CharacteristicValue();
+        $warnMsg = [];
+        $plantId = null;
+        $itemId = null;
+        $LineId = null;
+        $machineId = null;
+        $itemAgainstPlant = null;
+
+        $plantCode = $this->data['plant'];
+        $processOrder = trim($this->data['process_order'] ?? '');
+        $iCode = trim($this->data['item']);
+        $workCenter = trim($this->data['machine']);
+        $lineName = trim($this->data['line']);
+        $status = trim($this->data['status']);
+        $createdBy = trim($this->data['created_by']);
+        $coilNo = trim($this->data['coil_number']);
+
+        if ($plantCode == null || $plantCode == '') {
+            $warnMsg[] = 'Plant code cannot be empty';
+        } elseif ($iCode == null || $iCode == '') {
+            $warnMsg[] = 'Process Order cannot be empty';
+        } elseif ($workCenter == null || $workCenter == '') {
+            $warnMsg[] = 'Work center cannot be empty';
+        } elseif ($lineName == null || $lineName == '') {
+            $warnMsg[] = 'Line cannot be empty';
+        }
+
+        if (Str::length($plantCode) < 4 || ! is_numeric($plantCode) || ! preg_match('/^[1-9]\d{3,}$/', $plantCode)) {
+            $warnMsg[] = 'Invalid plant code found';
+        } else {
+            $plant = Plant::where('code', $plantCode)->first();
+            if (! $plant) {
+                $warnMsg[] = 'Plant not found';
+            } else {
+                $plantId = $plant->id;
+            }
+        }
+
+        if (Str::length($iCode) < 6 || ! ctype_alnum($iCode)) {
+            $warnMsg[] = 'Invalid item code found';
+        } else {
+            $itemCode = Item::where('code', $iCode)->first();
+            if (! $itemCode) {
+                $warnMsg[] = 'Item code not found';
+            } else {
+                if ($plantId) {
+                    $itemAgainstPlant = Item::where('code', $iCode)->where('plant_id', $plantId)->first();
+                    if (! $itemAgainstPlant) {
+                        $warnMsg[] = 'Item code not found for the given plant';
+                    } else {
+                        $itemId = $itemAgainstPlant->id;
+                    }
+                }
+            }
+        }
+
+        $lineExists = Line::where('name', $lineName)->first();
+        if (! $lineExists) {
+            $warnMsg[] = 'Line name not found';
+        } else {
+            if ($plantId) {
+                $lineAgainstPlant = Line::where('name', $lineName)->where('plant_id', $plantId)->first();
+                if (! $lineAgainstPlant) {
+                    $warnMsg[] = 'Line name not found for the given plant';
+                } else {
+                    $LineId = $lineAgainstPlant->id;
+                }
+            }
+        }
+
+        $workCenterExist = Machine::where('work_center', $workCenter)->first();
+        if (! $workCenterExist) {
+            $warnMsg[] = 'Work Center not found';
+        }
+
+        // $workCenterAgainstPlant = Machine::where('work_center', $workCenter)
+        //     ->where('plant_id', $plantId)
+        //     ->first();
+
+        // if (!$workCenterAgainstPlant) {
+        //     $warnMsg[] = 'Work center not found for the given plant';
+        // } else {
+        //     $MachineId = $workCenterAgainstPlant->id;
+        // }
+
+        if ($plantId != null && $LineId != null) {
+            $machineAgaPlantLine = Machine::where('plant_id', $plantId)
+                ->where('line_id', $LineId)
+                ->where('work_center', $workCenter)
+                ->first();
+
+            if (! $machineAgaPlantLine) {
+                $warnMsg[] = 'Work center not found for the given plant and line';
+            } else {
+                $machineId = $machineAgaPlantLine->id;
+            }
+        }
+
+        if ($processOrder == null || $processOrder == '') {
+            $warnMsg[] = 'Process Order cannot be empty';
+        }
+
+        if ($coilNo == null || $coilNo == '') {
+            $warnMsg[] = 'Coil No cannot be empty';
+        } elseif (! is_numeric($coilNo)) {
+            $warnMsg[] = 'Coil number should contain only numeric values!';
+        }
+
+        if ($status == null || $status == '' || ! $status) {
+            $warnMsg[] = 'Status cannot be empty';
+        } elseif (! in_array($status, ['Ok', 'NotOk'], true)) {
+            $warnMsg[] = "Status must be either 'Ok' or 'NotOk'!";
+        }
+
+        if ($createdBy == null || $createdBy == '' || ! $createdBy) {
+            $warnMsg[] = 'Created By cannot be empty';
+        }
+
+        // $existing = CharacteristicValue::where('plant_id', $plantId)
+        //     ->where('process_order', $processOrder)
+        //     ->where('coil_number', $coilNo)
+        //     ->first();
+
+        // if ($existing) {
+        //     $warnMsg[] = "Process order '{$processOrder}' with coil number '{$coilNo}' already exist for the plant code '{$plantCode}'!";
+        // }
+
+        if ($plantId && $processOrder) {
+            $existing = CharacteristicValue::where('plant_id', $plantId)
+                ->where('process_order', $processOrder)
+                ->where('coil_number', $coilNo)
+                ->first();
+
+            if ($existing) {
+                $warnMsg[] = "Coil number '{$coilNo}' already exists for Plant '{$plantCode}' and Process Order '{$processOrder}'.";
+            }
+        }
+
+        if ($plant && $itemCode && $processOrder != '') {
+
+            $existingOrder = ProcessOrder::where('plant_id', $plant->id)
+                ->where('process_order', $processOrder)
+                ->first();
+
+            if ($existingOrder && $existingOrder->item_id !== ($itemCode->id ?? null)) {
+                $warnMsg[] = 'Same Process Order already exists for this Plant with a different Item Code';
+            }
+        }
+
+        if (! empty($warnMsg)) {
+            throw new RowImportFailedException(implode(', ', $warnMsg));
+        }
+
+        return CharacteristicValue::create([
+            'plant_id' => $plantId,
+            'item_id' => $itemId,
+            'line_id' => $LineId,
+            'machine_id' => $machineId,
+            'process_order' => trim($this->data['process_order']),
+            'coil_number' => trim($this->data['coil_number']),
+            'status' => trim($this->data['status']),
+            'created_by' => trim($this->data['created_by']),
+        ]);
+
+        // return null;
+
+        // return new CharacteristicValue;
     }
 
     public static function getCompletedNotificationBody(Import $import): string
     {
-        $body = 'Your characteristic value import has completed and ' . number_format($import->successful_rows) . ' ' . str('row')->plural($import->successful_rows) . ' imported.';
+        $body = 'Your characteristic value import has completed and '.number_format($import->successful_rows).' '.str('row')->plural($import->successful_rows).' imported.';
 
         if ($failedRowsCount = $import->getFailedRowsCount()) {
-            $body .= ' ' . number_format($failedRowsCount) . ' ' . str('row')->plural($failedRowsCount) . ' failed to import.';
+            $body .= ' '.number_format($failedRowsCount).' '.str('row')->plural($failedRowsCount).' failed to import.';
         }
 
         return $body;