diff --git a/LOGICAL_RELATIONSHIPS.md b/LOGICAL_RELATIONSHIPS.md
index 575494d..12cf164 100644
--- a/LOGICAL_RELATIONSHIPS.md
+++ b/LOGICAL_RELATIONSHIPS.md
@@ -1,6 +1,6 @@
 # 논리적 데이터베이스 관계 문서
 
-> **자동 생성**: 2026-01-26 22:07:37
+> **자동 생성**: 2026-01-29 00:51:16
 > **소스**: Eloquent 모델 관계 분석
 
 ## 📊 모델별 관계 현황
@@ -194,6 +194,35 @@ ### model_versions
 - **model()**: belongsTo → `models`
 - **bomTemplates()**: hasMany → `bom_templates`
 
+### documents
+**모델**: `App\Models\Documents\Document`
+
+- **creator()**: belongsTo → `users`
+- **updater()**: belongsTo → `users`
+- **approvals()**: hasMany → `document_approvals`
+- **data()**: hasMany → `document_data`
+- **attachments()**: hasMany → `document_attachments`
+- **linkable()**: morphTo → `(Polymorphic)`
+
+### document_approvals
+**모델**: `App\Models\Documents\DocumentApproval`
+
+- **document()**: belongsTo → `documents`
+- **user()**: belongsTo → `users`
+- **creator()**: belongsTo → `users`
+
+### document_attachments
+**모델**: `App\Models\Documents\DocumentAttachment`
+
+- **document()**: belongsTo → `documents`
+- **file()**: belongsTo → `files`
+- **creator()**: belongsTo → `users`
+
+### document_datas
+**모델**: `App\Models\Documents\DocumentData`
+
+- **document()**: belongsTo → `documents`
+
 ### estimates
 **모델**: `App\Models\Estimate\Estimate`
 
diff --git a/database/migrations/2026_01_27_152523_create_global_categories_table.php b/database/migrations/2026_01_27_152523_create_global_categories_table.php
new file mode 100644
index 0000000..28baa8f
--- /dev/null
+++ b/database/migrations/2026_01_27_152523_create_global_categories_table.php
@@ -0,0 +1,118 @@
+<?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
+    {
+        Schema::create('global_categories', function (Blueprint $table) {
+            $table->id()->comment('글로벌 카테고리 PK');
+            $table->unsignedBigInteger('parent_id')->nullable()->comment('상위 카테고리ID(NULL=최상위)');
+            $table->string('code_group', 30)->comment('코드 그룹');
+            $table->string('profile_code', 30)->nullable()->comment('역할 프로필 코드');
+            $table->string('code', 30)->comment('카테고리 코드(영문, 고유)');
+            $table->string('name', 100)->comment('카테고리명');
+            $table->boolean('is_active')->default(true)->comment('활성여부');
+            $table->integer('sort_order')->default(1)->comment('정렬순서');
+            $table->string('description', 255)->nullable()->comment('비고');
+            $table->unsignedBigInteger('created_by')->nullable()->comment('등록자');
+            $table->unsignedBigInteger('updated_by')->nullable()->comment('수정자');
+            $table->unsignedBigInteger('deleted_by')->nullable()->comment('삭제자');
+            $table->timestamps();
+            $table->softDeletes();
+
+            // 인덱스
+            $table->unique(['code_group', 'code'], 'uq_global_codegroup_code');
+            $table->index('parent_id', 'idx_global_parent_id');
+            $table->index('code_group', 'idx_global_code_group');
+
+            // 자기 참조 FK
+            $table->foreign('parent_id', 'fk_global_category_parent')
+                ->references('id')
+                ->on('global_categories')
+                ->onDelete('set null');
+        });
+
+        // tenant 1의 카테고리를 글로벌 카테고리로 복사
+        $this->seedFromTenant1();
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('global_categories');
+    }
+
+    /**
+     * tenant 1의 카테고리를 글로벌로 복사
+     */
+    private function seedFromTenant1(): void
+    {
+        $categories = \DB::table('categories')
+            ->where('tenant_id', 1)
+            ->whereNull('deleted_at')
+            ->orderBy('parent_id')
+            ->orderBy('sort_order')
+            ->get();
+
+        if ($categories->isEmpty()) {
+            return;
+        }
+
+        $idMap = []; // old_id => new_id
+
+        // 1단계: parent_id가 NULL인 루트 카테고리
+        foreach ($categories->where('parent_id', null) as $cat) {
+            $newId = \DB::table('global_categories')->insertGetId([
+                'parent_id' => null,
+                'code_group' => $cat->code_group,
+                'profile_code' => $cat->profile_code,
+                'code' => $cat->code,
+                'name' => $cat->name,
+                'is_active' => $cat->is_active,
+                'sort_order' => $cat->sort_order,
+                'description' => $cat->description,
+                'created_at' => now(),
+                'updated_at' => now(),
+            ]);
+            $idMap[$cat->id] = $newId;
+        }
+
+        // 2단계: 자식 카테고리 (재귀적으로 처리)
+        $remaining = $categories->whereNotNull('parent_id');
+        $maxIterations = 10;
+        $iteration = 0;
+
+        while ($remaining->isNotEmpty() && $iteration < $maxIterations) {
+            $processed = [];
+            foreach ($remaining as $cat) {
+                if (isset($idMap[$cat->parent_id])) {
+                    $newId = \DB::table('global_categories')->insertGetId([
+                        'parent_id' => $idMap[$cat->parent_id],
+                        'code_group' => $cat->code_group,
+                        'profile_code' => $cat->profile_code,
+                        'code' => $cat->code,
+                        'name' => $cat->name,
+                        'is_active' => $cat->is_active,
+                        'sort_order' => $cat->sort_order,
+                        'description' => $cat->description,
+                        'created_at' => now(),
+                        'updated_at' => now(),
+                    ]);
+                    $idMap[$cat->id] = $newId;
+                    $processed[] = $cat->id;
+                }
+            }
+            $remaining = $remaining->whereNotIn('id', $processed);
+            $iteration++;
+        }
+    }
+};