diff --git a/api-v3/src/database/migrations/1790000100000-f4-inventory-function-history.ts b/api-v3/src/database/migrations/1790000100000-f4-inventory-function-history.ts
new file mode 100644
index 0000000..c87b657
--- /dev/null
+++ b/api-v3/src/database/migrations/1790000100000-f4-inventory-function-history.ts
@@ -0,0 +1,80 @@
+import { MigrationInterface, QueryRunner } from 'typeorm';
+
+export class F4InventoryFunctionHistory1790000100000 implements MigrationInterface {
+  name = 'F4InventoryFunctionHistory1790000100000';
+
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`
+      CREATE TABLE inventory_functions (
+        id uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+        code varchar(120) NOT NULL UNIQUE,
+        name varchar(240) NOT NULL,
+        description text,
+        is_active boolean NOT NULL DEFAULT true,
+        sort_order integer NOT NULL DEFAULT 0,
+        created_by uuid,
+        updated_by uuid,
+        created_at timestamptz NOT NULL DEFAULT CURRENT_TIMESTAMP,
+        updated_at timestamptz NOT NULL DEFAULT CURRENT_TIMESTAMP,
+        CONSTRAINT fk_inventory_functions_created_by FOREIGN KEY (created_by)
+          REFERENCES users(id) ON DELETE SET NULL,
+        CONSTRAINT fk_inventory_functions_updated_by FOREIGN KEY (updated_by)
+          REFERENCES users(id) ON DELETE SET NULL
+      )
+    `);
+    await queryRunner.query(`
+      CREATE INDEX idx_inventory_functions_active_sort
+      ON inventory_functions(is_active,sort_order,name)
+    `);
+
+    await queryRunner.query(`
+      CREATE TABLE inventory_function_assignments (
+        id uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+        asset_id uuid NOT NULL,
+        function_id uuid NOT NULL,
+        valid_from timestamptz NOT NULL,
+        valid_until timestamptz,
+        change_reason text,
+        changed_by uuid,
+        created_at timestamptz NOT NULL DEFAULT CURRENT_TIMESTAMP,
+        CONSTRAINT fk_inventory_function_assignment_asset FOREIGN KEY (asset_id)
+          REFERENCES assets(id) ON DELETE CASCADE,
+        CONSTRAINT fk_inventory_function_assignment_function FOREIGN KEY (function_id)
+          REFERENCES inventory_functions(id) ON DELETE RESTRICT,
+        CONSTRAINT fk_inventory_function_assignment_user FOREIGN KEY (changed_by)
+          REFERENCES users(id) ON DELETE SET NULL,
+        CONSTRAINT chk_inventory_function_assignment_dates CHECK (
+          valid_until IS NULL OR valid_until > valid_from
+        )
+      )
+    `);
+    await queryRunner.query(`
+      CREATE UNIQUE INDEX uq_inventory_function_assignment_current
+      ON inventory_function_assignments(asset_id)
+      WHERE valid_until IS NULL
+    `);
+    await queryRunner.query(`
+      CREATE INDEX idx_inventory_function_assignment_history
+      ON inventory_function_assignments(asset_id,valid_from DESC,created_at DESC)
+    `);
+    await queryRunner.query(`
+      CREATE INDEX idx_inventory_function_assignment_function
+      ON inventory_function_assignments(function_id,valid_from DESC)
+    `);
+
+    await queryRunner.query(`
+      INSERT INTO inventory_functions(code,name,description,sort_order)
+      VALUES
+        ('BOMBEO_MECANICO_AIB','Bombeo mecánico AIB',
+          'Función técnica de bombeo mecánico mediante aparato individual de bombeo (AIB).',10),
+        ('BOMBEO_MECANICO_ROTAFLEX','Bombeo mecánico Rotaflex',
+          'Función técnica de bombeo mecánico mediante sistema Rotaflex.',20)
+      ON CONFLICT (code) DO NOTHING
+    `);
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query('DROP TABLE IF EXISTS inventory_function_assignments');
+    await queryRunner.query('DROP TABLE IF EXISTS inventory_functions');
+  }
+}