diff --git a/api-v3/test/unit/f3-1-inventory-structure.test.ts b/api-v3/test/unit/f3-1-inventory-structure.test.ts
new file mode 100644
index 0000000..ca63f5e
--- /dev/null
+++ b/api-v3/test/unit/f3-1-inventory-structure.test.ts
@@ -0,0 +1,66 @@
+import 'reflect-metadata';
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { readFileSync } from 'node:fs';
+import {
+  F31_FINDING_GROUPS,
+  F31_INSTALLATION_FAMILIES,
+  F31_SUBINSTALLATION_FAMILIES,
+  F31_UNIVERSAL_FINDINGS,
+} from '../../src/reference-data/f3-1-inventory-excel';
+
+test('F3.1 conserva exactamente la estructura interpretada del Excel entregado', () => {
+  assert.equal(F31_FINDING_GROUPS.length, 19);
+  assert.equal(F31_INSTALLATION_FAMILIES.length, 14);
+  assert.equal(F31_SUBINSTALLATION_FAMILIES.length, 109);
+  assert.deepEqual(F31_UNIVERSAL_FINDINGS, [
+    'ORDEN Y LIMPIEZA',
+    'CARTELERIA PREVENTIVA / INFORMATIVA',
+    'EXTINTORES',
+  ]);
+});
+
+test('F3.1 mantiene cada Subinstalación ligada a una familia de Instalación válida', () => {
+  const installationCodes = new Set(F31_INSTALLATION_FAMILIES.map((item) => item.code));
+  for (const subinstallation of F31_SUBINSTALLATION_FAMILIES) {
+    assert.equal(installationCodes.has(subinstallation.parentCode), true, subinstallation.code);
+    assert.equal(subinstallation.level, 'SUBINSTALLATION');
+  }
+});
+
+test('F3.1 retira APP26 como catálogo activo sin borrar los Hallazgos históricos', () => {
+  const migration = readFileSync('src/database/migrations/1789844400000-phase-f3-1-inventory-structure-catalog.ts', 'utf8');
+  assert.match(migration, /UPDATE finding_categories SET is_active=false/);
+  assert.match(migration, /lower\(code\)='app26'/);
+  assert.match(migration, /APP26R2/);
+  assert.doesNotMatch(migration, /DELETE FROM finding_catalog_items/);
+  assert.doesNotMatch(migration, /DELETE FROM inspection_findings/);
+});
+
+test('F3.1 materializa familia técnica separada del tipo estructural', () => {
+  const migration = readFileSync('src/database/migrations/1789844400000-phase-f3-1-inventory-structure-catalog.ts', 'utf8');
+  assert.match(migration, /CREATE TABLE inventory_families/);
+  assert.match(migration, /ADD COLUMN inventory_family_id uuid/);
+  assert.match(migration, /finding_catalog_item_inventory_families/);
+  assert.match(migration, /'subinstalacion','Subinstalación'/);
+});
+
+test('F3.1 fuerza Área → Yacimiento → Instalación → Subinstalación en servidor', () => {
+  const service = readFileSync('src/asset-master/inventory-structure.service.ts', 'utf8');
+  assert.match(service, /YACIMIENTO: 'area'/);
+  assert.match(service, /INSTALACION: 'yacimiento'/);
+  assert.match(service, /SUBINSTALACION: 'instalacion'/);
+  assert.match(service, /INVENTORY_SUBINSTALLATION_FAMILY_PARENT_INVALID/);
+});
+
+test('F3.1 retira Relevamientos del dashboard y usa alta guiada de cuatro niveles', () => {
+  const layout = readFileSync('../web-v2/src/layout/AppLayout.tsx', 'utf8');
+  const app = readFileSync('../web-v2/src/app/App.tsx', 'utf8');
+  const page = readFileSync('../web-v2/src/pages/InventoryCreatePage.tsx', 'utf8');
+  assert.doesNotMatch(layout, /label: 'Relevamientos'/);
+  assert.match(app, /path="\/relevamiento\/\*" element={<Navigate to="\/inventarios" replace \/>}/);
+  assert.match(app, /path="\/inventarios\/nuevo" element={<InventoryCreatePage \/>}/);
+  for (const kind of ['AREA', 'YACIMIENTO', 'INSTALACION', 'SUBINSTALACION']) assert.match(page, new RegExp(`kind: '${kind}'`));
+  assert.doesNotMatch(page, /kind: 'EQUIPO'/);
+  assert.match(page, /getInventoryFamilyFindings/);
+});