diff --git a/app/Services/WorkOrderService.php b/app/Services/WorkOrderService.php
index 4fee2fe..04d89cd 100644
--- a/app/Services/WorkOrderService.php
+++ b/app/Services/WorkOrderService.php
@@ -31,6 +31,7 @@ public function index(array $params)
         $q = trim((string) ($params['q'] ?? ''));
         $status = $params['status'] ?? null;
         $processId = $params['process_id'] ?? null;
+        $processCode = $params['process_code'] ?? null;
         $assigneeId = $params['assignee_id'] ?? null;
         $assignedToMe = isset($params['assigned_to_me']) && $params['assigned_to_me'];
         $teamId = $params['team_id'] ?? null;
@@ -59,6 +60,11 @@ public function index(array $params)
             $query->where('process_id', $processId);
         }
 
+        // 공정 코드 필터 (process_code) - 대시보드용
+        if ($processCode !== null) {
+            $query->whereHas('process', fn ($q) => $q->where('process_code', $processCode));
+        }
+
         // 담당자 필터
         if ($assigneeId !== null) {
             $query->where('assignee_id', $assigneeId);