diff --git a/backend/src/controllers/authController.ts b/backend/src/controllers/authController.ts
index 95f3944..e678fcd 100644
--- a/backend/src/controllers/authController.ts
+++ b/backend/src/controllers/authController.ts
@@ -32,13 +32,19 @@ export interface JWTPayload {
 }
 
 export interface RegisterRequest {
-  email: string;
+  // REMOVED: email - will be auto-generated
   password: string;
-  firstname: String;
-  lastname: String;
+  firstname: string;
+  lastname: string;
   role?: string;
 }
 
+function generateEmail(firstname: string, lastname: string): string {
+  const cleanFirstname = firstname.toLowerCase().replace(/[^a-z0-9]/g, '');
+  const cleanLastname = lastname.toLowerCase().replace(/[^a-z0-9]/g, '');
+  return `${cleanFirstname}.${cleanLastname}@sp.de`;
+}
+
 export const login = async (req: Request, res: Response) => {
   try {
     const { email, password } = req.body as LoginRequest;
@@ -162,16 +168,19 @@ export const validateToken = async (req: Request, res: Response) => {
 
 export const register = async (req: Request, res: Response) => {
   try {
-    const { email, password, firstname, lastname, role = 'user' } = req.body as RegisterRequest;
+    const { password, firstname, lastname, role = 'user' } = req.body as RegisterRequest;
 
-    // Validate required fields
-    if (!email || !password || !firstname || !lastname) {
+    // Validate required fields - REMOVED email
+    if (!password || !firstname || !lastname) {
       return res.status(400).json({ 
-        error: 'E-Mail, Passwort und Name sind erforderlich' 
+        error: 'Password, firstname und lastname sind erforderlich' 
       });
     }
 
-    // Check if email already exists
+    // Generate email automatically
+    const email = generateEmail(firstname, lastname);
+
+    // Check if generated email already exists
     const existingUser = await db.get<Employee>(
       'SELECT id FROM employees WHERE email = ?',
       [email]
@@ -179,19 +188,19 @@ export const register = async (req: Request, res: Response) => {
 
     if (existingUser) {
       return res.status(400).json({ 
-        error: 'Ein Benutzer mit dieser E-Mail existiert bereits' 
+        error: `Ein Benutzer mit der E-Mail ${email} existiert bereits` 
       });
     }
 
-    // Hash password
+    // Hash password and create user
     const hashedPassword = await bcrypt.hash(password, 10);
 
-    // Insert user
-  const result = await db.run(
-    `INSERT INTO employees (id, email, password, firstname, lastname, role, employee_type, contract_type, can_work_alone, is_active) 
-    VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`,
-    [uuidv4(), email, hashedPassword, firstname, lastname, role, 'experienced', 'small', false, 1]
-  );
+    // Insert user with generated email
+    const result = await db.run(
+      `INSERT INTO employees (id, email, password, firstname, lastname, role, employee_type, contract_type, can_work_alone, is_active) 
+      VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`,
+      [uuidv4(), email, hashedPassword, firstname, lastname, role, 'experienced', 'small', false, 1]
+    );
 
     if (!result.lastID) {
       throw new Error('Benutzer konnte nicht erstellt werden');
@@ -199,7 +208,7 @@ export const register = async (req: Request, res: Response) => {
 
     // Get created user
     const newUser = await db.get<Employee>(
-      'SELECT id, email, name, role FROM employees WHERE id = ?',
+      'SELECT id, email, firstname, lastname, role FROM employees WHERE id = ?',
       [result.lastID]
     );
 
diff --git a/backend/src/controllers/employeeController.ts b/backend/src/controllers/employeeController.ts
index fcc99b1..b411e3b 100644
--- a/backend/src/controllers/employeeController.ts
+++ b/backend/src/controllers/employeeController.ts
@@ -6,6 +6,13 @@ import { db } from '../services/databaseService.js';
 import { AuthRequest } from '../middleware/auth.js';
 import { CreateEmployeeRequest } from '../models/Employee.js';
 
+function generateEmail(firstname: string, lastname: string): string {
+  // Remove special characters and convert to lowercase
+  const cleanFirstname = firstname.toLowerCase().replace(/[^a-z0-9]/g, '');
+  const cleanLastname = lastname.toLowerCase().replace(/[^a-z0-9]/g, '');
+  return `${cleanFirstname}.${cleanLastname}@sp.de`;
+}
+
 export const getEmployees = async (req: AuthRequest, res: Response): Promise<void> => {
   try {
     console.log('🔍 Fetching employees - User:', req.user);
@@ -76,41 +83,40 @@ export const createEmployee = async (req: AuthRequest, res: Response): Promise<v
     });
 
     const { 
-      email, 
       password, 
-      firstname,
-      lastname,
+      firstname, 
+      lastname, 
       role, 
       employeeType, 
       contractType,
       canWorkAlone
     } = req.body as CreateEmployeeRequest;
 
-    // Validierung
-    if (!email || !password || !firstname || !lastname || !role || !employeeType || !contractType) {
+    // Validation - REMOVED email check
+    if (!password || !firstname || !lastname || !role || !employeeType || !contractType) {
       console.log('❌ Validation failed: Missing required fields');
       res.status(400).json({ 
-        error: 'Email, password, name, role, employeeType und contractType sind erforderlich' 
+        error: 'Password, firstname, lastname, role, employeeType und contractType sind erforderlich' 
       });
       return;
     }
 
-    if (password.length < 6) {
-      console.log('❌ Validation failed: Password too short');
-      res.status(400).json({ error: 'Password must be at least 6 characters long' });
-      return;
-    }
+    // Generate email automatically
+    const email = generateEmail(firstname, lastname);
+    console.log('📧 Generated email:', email);
 
-    // Check if email already exists
-    const existingActiveUser = await db.get<any>('SELECT id FROM employees WHERE email = ? AND is_active = 1', [email]);
+    // Check if generated email already exists
+    const existingUser = await db.get<any>('SELECT id FROM employees WHERE email = ? AND is_active = 1', [email]);
     
-    if (existingActiveUser) {
-      console.log('❌ Email exists for active user:', existingActiveUser);
-      res.status(409).json({ error: 'Email already exists' });
+    if (existingUser) {
+      console.log('❌ Generated email already exists:', email);
+      res.status(409).json({ 
+        error: `Employee with email ${email} already exists. Please use different firstname/lastname.` 
+      });
       return;
     }
 
-    // Hash password
+    // Hash password and create employee
     const hashedPassword = await bcrypt.hash(password, 10);
     const employeeId = uuidv4();
 
@@ -123,8 +129,8 @@ export const createEmployee = async (req: AuthRequest, res: Response): Promise<v
         employeeId, 
         email, 
         hashedPassword, 
-        firstname,    // Changed from name
-        lastname,     // Added
+        firstname, 
+        lastname, 
         role, 
         employeeType, 
         contractType,
@@ -133,10 +139,10 @@ export const createEmployee = async (req: AuthRequest, res: Response): Promise<v
       ]
     );
 
-    // Return created employee
+    // Return created employee with generated email
     const newEmployee = await db.get<any>(`
       SELECT 
-        id, email, name, role, is_active as isActive,
+        id, email, firstname, lastname, role, is_active as isActive,
         employee_type as employeeType, 
         contract_type as contractType,
         can_work_alone as canWorkAlone,
@@ -157,35 +163,58 @@ export const updateEmployee = async (req: AuthRequest, res: Response): Promise<v
   try {
     const { id } = req.params;
     const { firstname, lastname, role, isActive, employeeType, contractType, canWorkAlone } = req.body;
-    console.log('📝 Update Employee Request:', { id, name, role, isActive, employeeType, contractType, canWorkAlone });
 
-    // Check if employee exists
-    const existingEmployee = await db.get('SELECT * FROM employees WHERE id = ?', [id]);
+    console.log('📝 Update Employee Request:', { id, firstname, lastname, role, isActive, employeeType, contractType, canWorkAlone });
+
+    // Check if employee exists and get current data
+    const existingEmployee = await db.get<any>('SELECT * FROM employees WHERE id = ?', [id]);
     if (!existingEmployee) {
       res.status(404).json({ error: 'Employee not found' });
       return;
     }
 
-    // Update employee
+    // Generate new email if firstname or lastname changed
+    let email = existingEmployee.email;
+    if (firstname || lastname) {
+      const newFirstname = firstname || existingEmployee.firstname;
+      const newLastname = lastname || existingEmployee.lastname;
+      email = generateEmail(newFirstname, newLastname);
+      
+      // Check if new email already exists (for another employee)
+      const emailExists = await db.get<any>(
+        'SELECT id FROM employees WHERE email = ? AND id != ? AND is_active = 1', 
+        [email, id]
+      );
+      
+      if (emailExists) {
+        res.status(409).json({ 
+          error: `Cannot update name - email ${email} already exists for another employee` 
+        });
+        return;
+      }
+    }
+
+    // Update employee with potentially new email
     await db.run(
       `UPDATE employees 
-      SET firstname = COALESCE(?, firstname),
-          lastname = COALESCE(?, lastname),
-          role = COALESCE(?, role),
-          is_active = COALESCE(?, is_active),
-          employee_type = COALESCE(?, employee_type),
-          contract_type = COALESCE(?, contract_type),
-          can_work_alone = COALESCE(?, can_work_alone)
-      WHERE id = ?`,
-      [firstname, lastname, role, isActive, employeeType, contractType, canWorkAlone, id]
+       SET firstname = COALESCE(?, firstname),
+           lastname = COALESCE(?, lastname),
+           email = ?,
+           role = COALESCE(?, role),
+           is_active = COALESCE(?, is_active),
+           employee_type = COALESCE(?, employee_type),
+           contract_type = COALESCE(?, contract_type),
+           can_work_alone = COALESCE(?, can_work_alone)
+       WHERE id = ?`,
+      [firstname, lastname, email, role, isActive, employeeType, contractType, canWorkAlone, id]
     );
 
-    console.log('✅ Employee updated successfully');
+    console.log('✅ Employee updated successfully with email:', email);
 
     // Return updated employee
     const updatedEmployee = await db.get<any>(`
       SELECT 
-        id, email, name, role, is_active as isActive, 
+        id, email, firstname, lastname, role, is_active as isActive, 
         employee_type as employeeType, 
         contract_type as contractType,
         can_work_alone as canWorkAlone,
diff --git a/backend/src/controllers/setupController.ts b/backend/src/controllers/setupController.ts
index 2ed106a..a35db8c 100644
--- a/backend/src/controllers/setupController.ts
+++ b/backend/src/controllers/setupController.ts
@@ -5,6 +5,25 @@ import { v4 as uuidv4 } from 'uuid';
 import { randomUUID } from 'crypto';
 import { db } from '../services/databaseService.js';
 
+// Add the same email generation function
+function generateEmail(firstname: string, lastname: string): string {
+  // Convert German umlauts to their expanded forms
+  const convertUmlauts = (str: string): string => {
+    return str
+      .toLowerCase()
+      .replace(/ü/g, 'ue')
+      .replace(/ö/g, 'oe')
+      .replace(/ä/g, 'ae')
+      .replace(/ß/g, 'ss');
+  };
+
+  // Remove any remaining special characters and convert to lowercase
+  const cleanFirstname = convertUmlauts(firstname).replace(/[^a-z0-9]/g, '');
+  const cleanLastname = convertUmlauts(lastname).replace(/[^a-z0-9]/g, '');
+  
+  return `${cleanFirstname}.${cleanLastname}@sp.de`;
+}
+
 export const checkSetupStatus = async (req: Request, res: Response): Promise<void> => {
   try {
     const adminExists = await db.get<{ 'COUNT(*)': number }>(
@@ -43,12 +62,11 @@ export const setupAdmin = async (req: Request, res: Response): Promise<void> =>
       return;
     }
 
-    const { password, firstname, lastname } = req.body;
-    const email = 'admin@instandhaltung.de';
+    const { password, firstname, lastname } = req.body; // Changed from name to firstname/lastname
 
-    console.log('👤 Creating admin with data:', { name, email });
+    console.log('👤 Creating admin with data:', { firstname, lastname });
 
-    // Validation
+    // Validation - updated for firstname/lastname
     if (!password || !firstname || !lastname) {
       res.status(400).json({ error: 'Passwort, Vorname und Nachname sind erforderlich' });
       return;
@@ -60,6 +78,10 @@ export const setupAdmin = async (req: Request, res: Response): Promise<void> =>
       return;
     }
 
+    // Generate email automatically using the same pattern
+    const email = generateEmail(firstname, lastname);
+    console.log('📧 Generated admin email:', email);
+
     // Hash password
     const hashedPassword = await bcrypt.hash(password, 10);
     const adminId = randomUUID();
@@ -70,18 +92,14 @@ export const setupAdmin = async (req: Request, res: Response): Promise<void> =>
     await db.run('BEGIN TRANSACTION');
 
     try {
-      // Create admin user
+      // Create admin user with generated email
       await db.run(
         `INSERT INTO employees (id, email, password, firstname, lastname, role, employee_type, contract_type, can_work_alone, is_active)
         VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`,
         [adminId, email, hashedPassword, firstname, lastname, 'admin', 'manager', 'large', true, 1]
       );
 
-      console.log('✅ Admin user created successfully');
-
-      // Initialize default templates WITHOUT starting a new transaction
-      //console.log('🔄 Initialisiere Standard-Vorlagen...');
-      //await initializeDefaultTemplates(adminId, false);
+      console.log('✅ Admin user created successfully with email:', email);
 
       // Commit the entire setup transaction
       await db.run('COMMIT');
@@ -91,7 +109,9 @@ export const setupAdmin = async (req: Request, res: Response): Promise<void> =>
       res.status(201).json({
         success: true,
         message: 'Admin erfolgreich erstellt',
-        email: email
+        email: email,
+        firstname: firstname,
+        lastname: lastname
       });
 
     } catch (dbError) {
diff --git a/backend/src/models/Employee.ts b/backend/src/models/Employee.ts
index 325b1b6..87623ed 100644
--- a/backend/src/models/Employee.ts
+++ b/backend/src/models/Employee.ts
@@ -14,7 +14,6 @@ export interface Employee {
 }
 
 export interface CreateEmployeeRequest {
-  email: string;
   password: string;
   firstname: string;
   lastname: string;
diff --git a/backend/src/models/ShiftPlan.ts b/backend/src/models/ShiftPlan.ts
index 932a2ea..e0eca0f 100644
--- a/backend/src/models/ShiftPlan.ts
+++ b/backend/src/models/ShiftPlan.ts
@@ -3,15 +3,15 @@ export interface ShiftPlan {
   id: string;
   name: string;
   description?: string;
-  startDate?: string; // Optional for templates
-  endDate?: string;   // Optional for templates
+  startDate?: string;
+  endDate?: string;
   isTemplate: boolean;
   status: 'draft' | 'published' | 'archived' | 'template';
   createdBy: string;
   createdAt: string;
   timeSlots: TimeSlot[];
   shifts: Shift[];
-  scheduledShifts?: ScheduledShift[]; // Only for non-template plans with dates
+  scheduledShifts?: ScheduledShift[];
 }
 
 export interface TimeSlot {
@@ -85,7 +85,6 @@ export interface AssignEmployeeRequest {
   scheduledShiftId: string;
 }
 
-
 export interface UpdateRequiredEmployeesRequest {
   requiredEmployees: number;
 }
\ No newline at end of file
diff --git a/backend/src/models/scheduling.ts b/backend/src/models/scheduling.ts
index 2f27e17..5943cc1 100644
--- a/backend/src/models/scheduling.ts
+++ b/backend/src/models/scheduling.ts
@@ -2,15 +2,20 @@
 import { Employee } from './Employee.js';
 import { ShiftPlan } from './ShiftPlan.js';
 
-// Add the missing type definitions
+// Updated Availability interface to match new schema
 export interface Availability {
   id: string;
   employeeId: string;
   planId: string;
-  dayOfWeek: number; // 1=Monday, 7=Sunday
-  timeSlotId: string;
+  shiftId: string; // Now references shift_id instead of time_slot_id + day_of_week
   preferenceLevel: 1 | 2 | 3; // 1:preferred, 2:available, 3:unavailable
   notes?: string;
+  // Optional convenience fields (can be joined from shifts and time_slots tables)
+  dayOfWeek?: number;
+  timeSlotId?: string;
+  timeSlotName?: string;
+  startTime?: string;
+  endTime?: string;
 }
 
 export interface Constraint {
@@ -120,4 +125,77 @@ export interface ShiftRequirement {
   maxEmployees: number;
   assignedEmployees: string[];
   isPriority: boolean;
+}
+
+// New types for the updated schema
+export interface EmployeeWithRoles extends Employee {
+  roles: string[];
+}
+
+export interface ShiftWithDetails {
+  id: string;
+  planId: string;
+  timeSlotId: string;
+  dayOfWeek: number;
+  requiredEmployees: number;
+  color?: string;
+  timeSlot: {
+    id: string;
+    name: string;
+    startTime: string;
+    endTime: string;
+    description?: string;
+  };
+}
+
+export interface AvailabilityWithDetails extends Availability {
+  employee?: {
+    id: string;
+    firstname: string;
+    lastname: string;
+    employeeType: 'manager' | 'trainee' | 'experienced';
+    canWorkAlone: boolean;
+  };
+  shift?: {
+    dayOfWeek: number;
+    timeSlotId: string;
+    timeSlot?: {
+      name: string;
+      startTime: string;
+      endTime: string;
+    };
+  };
+}
+
+// Types for scheduling algorithm input
+export interface SchedulingInput {
+  planId: string;
+  startDate: string;
+  endDate: string;
+  constraints: Constraint[];
+  options?: SolverOptions;
+}
+
+// Types for scheduling results with enhanced information
+export interface EnhancedAssignment extends Assignment {
+  employeeName: string;
+  shiftDetails: {
+    date: string;
+    dayOfWeek: number;
+    timeSlotName: string;
+    startTime: string;
+    endTime: string;
+  };
+  preferenceLevel: number;
+}
+
+export interface SchedulingStatistics {
+  totalShifts: number;
+  totalAssignments: number;
+  coverageRate: number;
+  preferenceSatisfaction: number;
+  constraintViolations: number;
+  hardConstraintViolations: number;
+  softConstraintViolations: number;
+  processingTime: number;
 }
\ No newline at end of file
diff --git a/frontend/src/models/Employee.ts b/frontend/src/models/Employee.ts
index 68aa0e1..87623ed 100644
--- a/frontend/src/models/Employee.ts
+++ b/frontend/src/models/Employee.ts
@@ -2,7 +2,8 @@
 export interface Employee {
   id: string;
   email: string;
-  name: string;
+  firstname: string;
+  lastname: string;
   role: 'admin' | 'maintenance' | 'user';
   employeeType: 'manager' | 'trainee' | 'experienced';
   contractType: 'small' | 'large';
@@ -13,9 +14,9 @@ export interface Employee {
 }
 
 export interface CreateEmployeeRequest {
-  email: string;
   password: string;
-  name: string;
+  firstname: string;
+  lastname: string;
   role: 'admin' | 'maintenance' | 'user';
   employeeType: 'manager' | 'trainee' | 'experienced';
   contractType: 'small' | 'large';
@@ -23,7 +24,8 @@ export interface CreateEmployeeRequest {
 }
 
 export interface UpdateEmployeeRequest {
-  name?: string;
+  firstname?: string;
+  lastname?: string;
   role?: 'admin' | 'maintenance' | 'user';
   employeeType?: 'manager' | 'trainee' | 'experienced';
   contractType?: 'small' | 'large';
@@ -39,8 +41,7 @@ export interface EmployeeAvailability {
   id: string;
   employeeId: string;
   planId: string;
-  dayOfWeek: number; // 1=Monday, 7=Sunday
-  timeSlotId: string;
+  shiftId: string; // Now references shift_id instead of time_slot_id + day_of_week
   preferenceLevel: 1 | 2 | 3; // 1:preferred, 2:available, 3:unavailable
   notes?: string;
 }
@@ -72,4 +73,14 @@ export interface ManagerSelfAssignmentRequest {
 
 export interface EmployeeWithAvailabilities extends Employee {
   availabilities: EmployeeAvailability[];
+}
+
+// Additional types for the new roles system
+export interface Role {
+  role: 'admin' | 'user' | 'maintenance';
+}
+
+export interface EmployeeRole {
+  employeeId: string;
+  role: 'admin' | 'user' | 'maintenance';
 }
\ No newline at end of file
diff --git a/frontend/src/models/ShiftPlan.ts b/frontend/src/models/ShiftPlan.ts
index bd2b05e..d44f6f3 100644
--- a/frontend/src/models/ShiftPlan.ts
+++ b/frontend/src/models/ShiftPlan.ts
@@ -3,14 +3,15 @@ export interface ShiftPlan {
   id: string;
   name: string;
   description?: string;
-  startDate?: string; // Optional for templates
-  endDate?: string;   // Optional for templates
+  startDate?: string;
+  endDate?: string;
   isTemplate: boolean;
   status: 'draft' | 'published' | 'archived' | 'template';
   createdBy: string;
   createdAt: string;
   timeSlots: TimeSlot[];
   shifts: Shift[];
+  scheduledShifts?: ScheduledShift[];
 }
 
 export interface TimeSlot {
@@ -49,16 +50,6 @@ export interface ShiftAssignment {
   assignedBy: string;
 }
 
-export interface EmployeeAvailability {
-  id: string;
-  employeeId: string;
-  planId: string;
-  dayOfWeek: number;
-  timeSlotId: string;
-  preferenceLevel: 1 | 2 | 3; // 1:preferred, 2:available, 3:unavailable
-  notes?: string;
-}
-
 // Request/Response DTOs
 export interface CreateShiftPlanRequest {
   name: string;
@@ -68,7 +59,6 @@ export interface CreateShiftPlanRequest {
   isTemplate: boolean;
   timeSlots: Omit<TimeSlot, 'id' | 'planId'>[];
   shifts: Omit<Shift, 'id' | 'planId'>[];
-  templateId?: string;
 }
 
 export interface UpdateShiftPlanRequest {
@@ -95,10 +85,6 @@ export interface AssignEmployeeRequest {
   scheduledShiftId: string;
 }
 
-export interface UpdateAvailabilityRequest {
-  planId: string;
-  availabilities: Omit<EmployeeAvailability, 'id' | 'employeeId'>[];
-}
 
 export interface UpdateRequiredEmployeesRequest {
   requiredEmployees: number;
diff --git a/frontend/src/models/scheduling.ts b/frontend/src/models/scheduling.ts
index c6427bc..5943cc1 100644
--- a/frontend/src/models/scheduling.ts
+++ b/frontend/src/models/scheduling.ts
@@ -2,15 +2,20 @@
 import { Employee } from './Employee.js';
 import { ShiftPlan } from './ShiftPlan.js';
 
-// Add the missing type definitions
+// Updated Availability interface to match new schema
 export interface Availability {
   id: string;
   employeeId: string;
   planId: string;
-  dayOfWeek: number; // 1=Monday, 7=Sunday
-  timeSlotId: string;
+  shiftId: string; // Now references shift_id instead of time_slot_id + day_of_week
   preferenceLevel: 1 | 2 | 3; // 1:preferred, 2:available, 3:unavailable
   notes?: string;
+  // Optional convenience fields (can be joined from shifts and time_slots tables)
+  dayOfWeek?: number;
+  timeSlotId?: string;
+  timeSlotName?: string;
+  startTime?: string;
+  endTime?: string;
 }
 
 export interface Constraint {
@@ -75,6 +80,7 @@ export interface Solution {
     variablesCreated: number;
     optimal: boolean;
   };
+  variables?: { [key: string]: number };
 }
 
 // Additional helper types for the scheduling system
@@ -119,4 +125,77 @@ export interface ShiftRequirement {
   maxEmployees: number;
   assignedEmployees: string[];
   isPriority: boolean;
+}
+
+// New types for the updated schema
+export interface EmployeeWithRoles extends Employee {
+  roles: string[];
+}
+
+export interface ShiftWithDetails {
+  id: string;
+  planId: string;
+  timeSlotId: string;
+  dayOfWeek: number;
+  requiredEmployees: number;
+  color?: string;
+  timeSlot: {
+    id: string;
+    name: string;
+    startTime: string;
+    endTime: string;
+    description?: string;
+  };
+}
+
+export interface AvailabilityWithDetails extends Availability {
+  employee?: {
+    id: string;
+    firstname: string;
+    lastname: string;
+    employeeType: 'manager' | 'trainee' | 'experienced';
+    canWorkAlone: boolean;
+  };
+  shift?: {
+    dayOfWeek: number;
+    timeSlotId: string;
+    timeSlot?: {
+      name: string;
+      startTime: string;
+      endTime: string;
+    };
+  };
+}
+
+// Types for scheduling algorithm input
+export interface SchedulingInput {
+  planId: string;
+  startDate: string;
+  endDate: string;
+  constraints: Constraint[];
+  options?: SolverOptions;
+}
+
+// Types for scheduling results with enhanced information
+export interface EnhancedAssignment extends Assignment {
+  employeeName: string;
+  shiftDetails: {
+    date: string;
+    dayOfWeek: number;
+    timeSlotName: string;
+    startTime: string;
+    endTime: string;
+  };
+  preferenceLevel: number;
+}
+
+export interface SchedulingStatistics {
+  totalShifts: number;
+  totalAssignments: number;
+  coverageRate: number;
+  preferenceSatisfaction: number;
+  constraintViolations: number;
+  hardConstraintViolations: number;
+  softConstraintViolations: number;
+  processingTime: number;
 }
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