diff --git a/LOGICAL_RELATIONSHIPS.md b/LOGICAL_RELATIONSHIPS.md
index 0a2b7ff..57a524c 100644
--- a/LOGICAL_RELATIONSHIPS.md
+++ b/LOGICAL_RELATIONSHIPS.md
@@ -1,6 +1,6 @@
 # 논리적 데이터베이스 관계 문서
 
-> **자동 생성**: 2026-02-12 20:26:02
+> **자동 생성**: 2026-02-13 11:19:58
 > **소스**: Eloquent 모델 관계 분석
 
 ## 📊 모델별 관계 현황
@@ -635,10 +635,8 @@ ### work_orders
 - **items()**: hasMany → `work_order_items`
 - **issues()**: hasMany → `work_order_issues`
 - **stepProgress()**: hasMany → `work_order_step_progress`
-- **materialInputs()**: hasMany → `work_order_material_inputs`
 - **shipments()**: hasMany → `shipments`
 - **bendingDetail()**: hasOne → `work_order_bending_details`
-- **documents()**: morphMany → `documents`
 
 ### work_order_assignees
 **모델**: `App\Models\Production\WorkOrderAssignee`
@@ -664,16 +662,6 @@ ### work_order_items
 - **workOrder()**: belongsTo → `work_orders`
 - **item()**: belongsTo → `items`
 - **sourceOrderItem()**: belongsTo → `order_items`
-- **materialInputs()**: hasMany → `work_order_material_inputs`
-
-### work_order_material_inputs
-**모델**: `App\Models\Production\WorkOrderMaterialInput`
-
-- **workOrder()**: belongsTo → `work_orders`
-- **workOrderItem()**: belongsTo → `work_order_items`
-- **stockLot()**: belongsTo → `stock_lots`
-- **item()**: belongsTo → `items`
-- **inputBy()**: belongsTo → `users`
 
 ### work_order_step_progress
 **모델**: `App\Models\Production\WorkOrderStepProgress`
diff --git a/database/migrations/2026_02_13_160000_add_trade_type_to_trading_partners_table.php b/database/migrations/2026_02_13_160000_add_trade_type_to_trading_partners_table.php
new file mode 100644
index 0000000..2e4b6fa
--- /dev/null
+++ b/database/migrations/2026_02_13_160000_add_trade_type_to_trading_partners_table.php
@@ -0,0 +1,22 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::table('trading_partners', function (Blueprint $table) {
+            $table->string('trade_type', 20)->default('sales')->after('name')->comment('매출/매입 구분 (sales/purchase)');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('trading_partners', function (Blueprint $table) {
+            $table->dropColumn('trade_type');
+        });
+    }
+};