diff --git a/api-v3/src/asset-master/inventory-family-catalog.service.ts b/api-v3/src/asset-master/inventory-family-catalog.service.ts
index 0c76928..c6d7c93 100644
--- a/api-v3/src/asset-master/inventory-family-catalog.service.ts
+++ b/api-v3/src/asset-master/inventory-family-catalog.service.ts
@@ -1,28 +1,71 @@
-import { Injectable, NotFoundException } from '@nestjs/common';
-import { DataSource } from 'typeorm';
+import { randomUUID } from 'node:crypto';
+import {
+  BadRequestException,
+  ConflictException,
+  Injectable,
+  NotFoundException,
+} from '@nestjs/common';
+import { DataSource, EntityManager } from 'typeorm';
+import { administrationAuditContext } from '../administration/common/administration-audit';
+import { AuditService } from '../audit/audit.service';
+import type { AuthPrincipal, RequestWithContext } from '../common/http/request-context';
+import { AuditAction } from '../database/entities';
+import type {
+  CreateInventoryFamilyDto,
+  ReplaceInventoryFamilyFindingsDto,
+  UpdateInventoryFamilyDto,
+} from './dto/inventory-family-admin.dto';
+
+type FamilyRow = {
+  id: string;
+  code: string;
+  name: string;
+  level: 'INSTALLATION' | 'SUBINSTALLATION';
+  informationLabels: string[];
+  sourceReference: string | null;
+  isActive: boolean;
+  parentFamilyId: string | null;
+  parentFamilyCode: string | null;
+  parentFamilyName: string | null;
+  assetCount: number;
+  findingCount: number;
+  findingItemIds: string[];
+};
 
 @Injectable()
 export class InventoryFamilyCatalogService {
-  constructor(private readonly dataSource: DataSource) {}
+  constructor(
+    private readonly dataSource: DataSource,
+    private readonly audit: AuditService,
+  ) {}
+
+  async listAdmin() {
+    const data = await this.dataSource.query(`
+      SELECT
+        family.id,family.code,family.name,family.level,
+        family.information_labels AS "informationLabels",
+        family.source_reference AS "sourceReference",
+        family.is_active AS "isActive",
+        parent.id AS "parentFamilyId",parent.code AS "parentFamilyCode",parent.name AS "parentFamilyName",
+        (SELECT COUNT(*)::integer FROM assets asset WHERE asset.inventory_family_id=family.id) AS "assetCount",
+        (SELECT COUNT(*)::integer FROM finding_catalog_item_inventory_families mapping WHERE mapping.inventory_family_id=family.id) AS "findingCount",
+        COALESCE((
+          SELECT JSONB_AGG(mapping.catalog_item_id ORDER BY item.title,item.id)
+          FROM finding_catalog_item_inventory_families mapping
+          JOIN finding_catalog_items item ON item.id=mapping.catalog_item_id
+          WHERE mapping.inventory_family_id=family.id
+        ),'[]'::jsonb) AS "findingItemIds"
+      FROM inventory_families family
+      LEFT JOIN inventory_family_parent_rules rule ON rule.child_family_id=family.id
+      LEFT JOIN inventory_families parent ON parent.id=rule.parent_family_id
+      ORDER BY family.level,family.is_active DESC,
+        COALESCE(parent.name,''),family.name,family.code
+    `) as FamilyRow[];
+    return { data };
+  }
 
   async findings(familyId: string) {
-    const [family] = await this.dataSource.query(`
-      SELECT id,code,name,level,information_labels AS "informationLabels"
-      FROM inventory_families
-      WHERE id=$1::uuid AND is_active=true
-    `, [familyId]) as Array<{
-      id: string;
-      code: string;
-      name: string;
-      level: string;
-      informationLabels: string[];
-    }>;
-    if (!family) {
-      throw new NotFoundException({
-        code: 'INVENTORY_FAMILY_NOT_FOUND',
-        message: 'La familia técnica no existe',
-      });
-    }
+    const family = await this.family(familyId, false);
     const items = await this.dataSource.query(`
       SELECT item.id,item.code,item.source_number AS "sourceNumber",item.title,
         item.legal_basis AS "legalBasis",item.glossary,item.suggested_severity AS "suggestedSeverity",
@@ -36,4 +79,221 @@ export class InventoryFamilyCatalogService {
     `, [familyId]);
     return { family, items, count: items.length };
   }
+
+  async create(
+    dto: CreateInventoryFamilyDto,
+    principal: AuthPrincipal,
+    request: RequestWithContext,
+  ) {
+    return this.dataSource.transaction(async (manager) => {
+      const parentId = await this.validateParent(manager,dto.level,dto.parentFamilyId ?? null,null);
+      const code = `CUSTOM-${dto.level === 'INSTALLATION' ? 'I' : 'S'}-${randomUUID().slice(0,8).toUpperCase()}`;
+      const [inserted] = (await manager.query(`
+        INSERT INTO inventory_families(
+          code,name,level,legacy_type_code,information_labels,source_reference,is_active
+        ) VALUES ($1,$2,$3,NULL,$4::jsonb,'MANUAL:F5',true)
+        RETURNING id
+      `,[code,dto.name,dto.level,JSON.stringify(this.cleanLabels(dto.informationLabels ?? []))])) as Array<{id:string}>;
+      if (!inserted) throw new Error('No se pudo crear la clasificación de Inventario');
+      if (parentId) {
+        await manager.query(`
+          INSERT INTO inventory_family_parent_rules(child_family_id,parent_family_id)
+          VALUES ($1::uuid,$2::uuid)
+        `,[inserted.id,parentId]);
+      }
+      const created = await this.family(inserted.id,false,manager);
+      await this.audit.record({
+        ...administrationAuditContext(principal,request),
+        action: AuditAction.ASSET_UPDATED,
+        entityType: 'inventory_family',
+        entityId: inserted.id,
+        afterData: created as unknown as Record<string,unknown>,
+        metadata: { operation:'INVENTORY_FAMILY_CREATED', source:'MANUAL:F5' },
+      },manager);
+      return created;
+    });
+  }
+
+  async update(
+    familyId: string,
+    dto: UpdateInventoryFamilyDto,
+    principal: AuthPrincipal,
+    request: RequestWithContext,
+  ) {
+    return this.dataSource.transaction(async (manager) => {
+      const before = await this.family(familyId,false,manager,true);
+      const nextParentId = dto.parentFamilyId === undefined
+        ? before.parentFamilyId
+        : dto.parentFamilyId;
+      const parentId = await this.validateParent(manager,before.level,nextParentId ?? null,familyId);
+      await manager.query(`
+        UPDATE inventory_families SET
+          name=COALESCE($2::varchar,name),
+          information_labels=COALESCE($3::jsonb,information_labels),
+          is_active=COALESCE($4::boolean,is_active),
+          updated_at=CURRENT_TIMESTAMP
+        WHERE id=$1::uuid
+      `,[
+        familyId,
+        dto.name ?? null,
+        dto.informationLabels === undefined ? null : JSON.stringify(this.cleanLabels(dto.informationLabels)),
+        dto.isActive ?? null,
+      ]);
+      if (before.level==='SUBINSTALLATION') {
+        await manager.query(`DELETE FROM inventory_family_parent_rules WHERE child_family_id=$1::uuid`,[familyId]);
+        if (parentId) {
+          await manager.query(`
+            INSERT INTO inventory_family_parent_rules(child_family_id,parent_family_id)
+            VALUES ($1::uuid,$2::uuid)
+          `,[familyId,parentId]);
+        }
+      }
+      const after = await this.family(familyId,false,manager);
+      await this.audit.record({
+        ...administrationAuditContext(principal,request),
+        action: AuditAction.ASSET_UPDATED,
+        entityType: 'inventory_family',
+        entityId: familyId,
+        beforeData: before as unknown as Record<string,unknown>,
+        afterData: after as unknown as Record<string,unknown>,
+        metadata: { operation:'INVENTORY_FAMILY_UPDATED' },
+      },manager);
+      return after;
+    });
+  }
+
+  async replaceFindings(
+    familyId: string,
+    dto: ReplaceInventoryFamilyFindingsDto,
+    principal: AuthPrincipal,
+    request: RequestWithContext,
+  ) {
+    return this.dataSource.transaction(async (manager) => {
+      const family = await this.family(familyId,false,manager,true);
+      const uniqueIds=[...new Set(dto.itemIds)];
+      if (uniqueIds.length) {
+        const [count] = (await manager.query(`
+          SELECT COUNT(*)::integer AS total
+          FROM finding_catalog_items item
+          JOIN finding_categories category ON category.id=item.category_id
+          WHERE item.id=ANY($1::uuid[]) AND item.is_active=true AND category.is_active=true
+        `,[uniqueIds])) as Array<{total:number}>;
+        if (Number(count?.total ?? 0)!==uniqueIds.length) {
+          throw new BadRequestException({
+            code:'INVENTORY_FAMILY_FINDING_INVALID',
+            message:'Uno o más Hallazgos elegidos no están activos en el catálogo',
+          });
+        }
+      }
+      const beforeIds=family.findingItemIds;
+      await manager.query(`DELETE FROM finding_catalog_item_inventory_families WHERE inventory_family_id=$1::uuid`,[familyId]);
+      if (uniqueIds.length) {
+        await manager.query(`
+          INSERT INTO finding_catalog_item_inventory_families(catalog_item_id,inventory_family_id)
+          SELECT item_id,$2::uuid FROM UNNEST($1::uuid[]) AS selected(item_id)
+          ON CONFLICT (catalog_item_id,inventory_family_id) DO NOTHING
+        `,[uniqueIds,familyId]);
+      }
+      const after=await this.family(familyId,false,manager);
+      await this.audit.record({
+        ...administrationAuditContext(principal,request),
+        action: AuditAction.ASSET_UPDATED,
+        entityType:'inventory_family_findings',
+        entityId:familyId,
+        beforeData:{ itemIds:beforeIds },
+        afterData:{ itemIds:after.findingItemIds },
+        metadata:{ operation:'INVENTORY_FAMILY_FINDINGS_REPLACED', reason:dto.reason },
+      },manager);
+      return this.findingsWithManager(manager,familyId);
+    });
+  }
+
+  private async findingsWithManager(manager:EntityManager,familyId:string) {
+    const family=await this.family(familyId,false,manager);
+    const items=await manager.query(`
+      SELECT item.id,item.code,item.source_number AS "sourceNumber",item.title,
+        item.legal_basis AS "legalBasis",item.glossary,item.suggested_severity AS "suggestedSeverity",
+        category.id AS "categoryId",category.code AS "categoryCode",category.name AS "categoryName"
+      FROM finding_catalog_item_inventory_families mapping
+      JOIN finding_catalog_items item ON item.id=mapping.catalog_item_id
+      JOIN finding_categories category ON category.id=item.category_id
+      WHERE mapping.inventory_family_id=$1::uuid
+        AND item.is_active=true AND category.is_active=true
+      ORDER BY category.sort_order,item.source_number,item.title
+    `,[familyId]);
+    return {family,items,count:items.length};
+  }
+
+  private async family(
+    familyId:string,
+    activeOnly:boolean,
+    manager:EntityManager=this.dataSource.manager,
+    lock=false,
+  ):Promise<FamilyRow> {
+    const rows=(await manager.query(`
+      SELECT family.id,family.code,family.name,family.level,
+        family.information_labels AS "informationLabels",
+        family.source_reference AS "sourceReference",family.is_active AS "isActive",
+        parent.id AS "parentFamilyId",parent.code AS "parentFamilyCode",parent.name AS "parentFamilyName",
+        (SELECT COUNT(*)::integer FROM assets asset WHERE asset.inventory_family_id=family.id) AS "assetCount",
+        (SELECT COUNT(*)::integer FROM finding_catalog_item_inventory_families mapping WHERE mapping.inventory_family_id=family.id) AS "findingCount",
+        COALESCE((SELECT JSONB_AGG(mapping.catalog_item_id ORDER BY mapping.catalog_item_id)
+          FROM finding_catalog_item_inventory_families mapping WHERE mapping.inventory_family_id=family.id),'[]'::jsonb) AS "findingItemIds"
+      FROM inventory_families family
+      LEFT JOIN inventory_family_parent_rules rule ON rule.child_family_id=family.id
+      LEFT JOIN inventory_families parent ON parent.id=rule.parent_family_id
+      WHERE family.id=$1::uuid ${activeOnly ? 'AND family.is_active=true' : ''}
+      ${lock ? 'FOR UPDATE OF family' : ''}
+    `,[familyId])) as FamilyRow[];
+    if (!rows[0]) throw new NotFoundException({
+      code:'INVENTORY_FAMILY_NOT_FOUND',message:'La clasificación de Inventario no existe',
+    });
+    return rows[0];
+  }
+
+  private async validateParent(
+    manager:EntityManager,
+    level:'INSTALLATION'|'SUBINSTALLATION',
+    parentFamilyId:string|null,
+    ownId:string|null,
+  ):Promise<string|null> {
+    if (level==='INSTALLATION') {
+      if (parentFamilyId) throw new BadRequestException({
+        code:'INVENTORY_FAMILY_PARENT_NOT_ALLOWED',
+        message:'Una clasificación de Instalación no tiene clasificación padre',
+      });
+      return null;
+    }
+    if (!parentFamilyId) throw new BadRequestException({
+      code:'INVENTORY_FAMILY_PARENT_REQUIRED',
+      message:'Una Subinstalación debe pertenecer a un tipo de Instalación',
+    });
+    if (parentFamilyId===ownId) throw new BadRequestException({
+      code:'INVENTORY_FAMILY_PARENT_CYCLE',message:'Una clasificación no puede ser su propio padre',
+    });
+    const rows=(await manager.query(`
+      SELECT id FROM inventory_families
+      WHERE id=$1::uuid AND level='INSTALLATION' AND is_active=true
+      LIMIT 1
+    `,[parentFamilyId])) as Array<{id:string}>;
+    if (!rows[0]) throw new BadRequestException({
+      code:'INVENTORY_FAMILY_PARENT_INVALID',
+      message:'La Subinstalación debe vincularse a una clasificación de Instalación activa',
+    });
+    return parentFamilyId;
+  }
+
+  private cleanLabels(labels:string[]):string[] {
+    const unique=new Map<string,string>();
+    for (const raw of labels) {
+      const clean=raw.trim();
+      if (!clean) continue;
+      const identity=clean.toLocaleLowerCase('es-AR');
+      if (!unique.has(identity)) unique.set(identity,clean);
+    }
+    if (unique.size>100) throw new ConflictException({
+      code:'INVENTORY_FAMILY_TOO_MANY_FIELDS',message:'La clasificación admite hasta 100 campos de información',
+    });
+    return [...unique.values()];
+  }
 }