diff --git a/app/Services/WorkOrderService.php b/app/Services/WorkOrderService.php
index 3d925ce..3311d68 100644
--- a/app/Services/WorkOrderService.php
+++ b/app/Services/WorkOrderService.php
@@ -1229,16 +1229,18 @@ public function getMaterials(int $workOrderId): array
 
                     // 합산 키: (item_id, work_order_item_id) 쌍
                     $key = $childItemId.'_'.$woItem->id;
+                    // dynamic_bom.qty는 아이템 수량이 곱해져 있으므로 나눠서 개소당 수량 산출
                     $bomQty = (float) ($bomEntry['qty'] ?? 1);
-                    $requiredQty = $bomQty * ($woItem->quantity ?? 1);
+                    $woItemQty = max(1, (float) ($woItem->quantity ?? 1));
+                    $perNodeQty = $bomQty / $woItemQty;
 
                     if (isset($uniqueMaterials[$key])) {
-                        $uniqueMaterials[$key]['required_qty'] += $requiredQty;
+                        $uniqueMaterials[$key]['required_qty'] += $perNodeQty;
                     } else {
                         $uniqueMaterials[$key] = [
                             'item' => $dynamicItems[$childItemId],
-                            'bom_qty' => $bomQty,
-                            'required_qty' => $requiredQty,
+                            'bom_qty' => $perNodeQty,
+                            'required_qty' => $perNodeQty,
                             'work_order_item_id' => $woItem->id,
                             'lot_prefix' => $bomEntry['lot_prefix'] ?? null,
                             'part_type' => $bomEntry['part_type'] ?? null,
@@ -2847,7 +2849,45 @@ public function getMaterialsForItem(int $workOrderId, int $itemId): array
         // 해당 개소의 BOM 기반 자재 추출
         $materialItems = [];
 
-        if ($woItem->item_id) {
+        // ① dynamic_bom 우선 체크 (절곡 등 동적 BOM 사용 공정)
+        $options = is_string($woItem->options) ? json_decode($woItem->options, true) : ($woItem->options ?? []);
+        $dynamicBom = $options['dynamic_bom'] ?? null;
+
+        if ($dynamicBom && is_array($dynamicBom)) {
+            // dynamic_bom child_item_id 배치 조회 (N+1 방지)
+            $childItemIds = array_filter(array_column($dynamicBom, 'child_item_id'));
+            $childItems = [];
+            if (! empty($childItemIds)) {
+                $childItems = \App\Models\Items\Item::where('tenant_id', $tenantId)
+                    ->whereIn('id', array_unique($childItemIds))
+                    ->get()
+                    ->keyBy('id');
+            }
+
+            foreach ($dynamicBom as $bomEntry) {
+                $childItemId = $bomEntry['child_item_id'] ?? null;
+                if (! $childItemId || ! isset($childItems[$childItemId])) {
+                    continue;
+                }
+
+                // dynamic_bom.qty는 아이템 수량이 곱해져 있으므로 나눠서 개소당 수량 산출
+                // (작업일지 bendingInfo와 동일한 수량)
+                $bomQty = (float) ($bomEntry['qty'] ?? 1);
+                $woItemQty = max(1, (float) ($woItem->quantity ?? 1));
+                $perNodeQty = $bomQty / $woItemQty;
+                $materialItems[] = [
+                    'item' => $childItems[$childItemId],
+                    'bom_qty' => $perNodeQty,
+                    'required_qty' => $perNodeQty,
+                    'lot_prefix' => $bomEntry['lot_prefix'] ?? null,
+                    'part_type' => $bomEntry['part_type'] ?? null,
+                    'category' => $bomEntry['category'] ?? null,
+                ];
+            }
+        }
+
+        // ② dynamic_bom이 없으면 정적 BOM fallback
+        if (empty($materialItems) && $woItem->item_id) {
             $item = \App\Models\Items\Item::where('tenant_id', $tenantId)
                 ->find($woItem->item_id);
 
@@ -2936,6 +2976,9 @@ public function getMaterialsForItem(int $workOrderId, int $itemId): array
                         'receipt_date' => $lot->receipt_date,
                         'supplier' => $lot->supplier,
                         'fifo_rank' => $rank++,
+                        'lot_prefix' => $matInfo['lot_prefix'] ?? null,
+                        'part_type' => $matInfo['part_type'] ?? null,
+                        'category' => $matInfo['category'] ?? null,
                     ];
                 }
             }
@@ -2959,6 +3002,9 @@ public function getMaterialsForItem(int $workOrderId, int $itemId): array
                     'receipt_date' => null,
                     'supplier' => null,
                     'fifo_rank' => $rank++,
+                    'lot_prefix' => $matInfo['lot_prefix'] ?? null,
+                    'part_type' => $matInfo['part_type'] ?? null,
+                    'category' => $matInfo['category'] ?? null,
                 ];
             }
         }