diff --git a/FurnitureFactory/FurnitureContracts/BusinessLogicsContracts/IOrdersLogic.cs b/FurnitureFactory/FurnitureContracts/BusinessLogicsContracts/IOrdersLogic.cs
new file mode 100644
index 0000000..8bd95b2
--- /dev/null
+++ b/FurnitureFactory/FurnitureContracts/BusinessLogicsContracts/IOrdersLogic.cs
@@ -0,0 +1,15 @@
+using FurnitureContracts.BindingModels;
+using FurnitureContracts.SearchModels;
+using FurnitureContracts.ViewModel;
+
+namespace FurnitureContracts.BusinessLogicsContracts
+{
+    public class IOrdersLogic
+    {
+        List<OrdersViewModel>? ReadList(OrderSearchModel? model);
+        OrdersViewModel? ReadElement(OrderSearchModel model);
+        bool Create(OrdersBindingModel model);
+        bool Update(OrdersBindingModel model);
+        bool Delete(OrdersBindingModel model);
+    }
+}
diff --git a/FurnitureFactory/FurnitureContracts/ViewModel/HeadsetViewModel.cs b/FurnitureFactory/FurnitureContracts/ViewModel/HeadsetViewModel.cs
index 428c441..6b8ef44 100644
--- a/FurnitureFactory/FurnitureContracts/ViewModel/HeadsetViewModel.cs
+++ b/FurnitureFactory/FurnitureContracts/ViewModel/HeadsetViewModel.cs
@@ -8,7 +8,7 @@ using System.Threading.Tasks;
 
 namespace FurnitureContracts.ViewModel
 {
-    public class HeadsetViewModel
+    public class HeadsetViewModel : IHeadsetModel
     {
         public int Cost { get; set; }
 
diff --git a/FurnitureFactory/FurnitureContracts/ViewModel/OrdersViewModel.cs b/FurnitureFactory/FurnitureContracts/ViewModel/OrdersViewModel.cs
index d6effc5..c1f0e4e 100644
--- a/FurnitureFactory/FurnitureContracts/ViewModel/OrdersViewModel.cs
+++ b/FurnitureFactory/FurnitureContracts/ViewModel/OrdersViewModel.cs
@@ -8,7 +8,7 @@ using System.Threading.Tasks;
 
 namespace FurnitureContracts.ViewModel
 {
-    public class OrdersViewModel
+    public class OrdersViewModel : IOrdersModel
     {
         [DisplayName("Дата заказа")]
         public DateTime Date { get; set; }
diff --git a/FurnitureFactory/FurnitureContracts/ViewModel/RoleViewModel.cs b/FurnitureFactory/FurnitureContracts/ViewModel/RoleViewModel.cs
index e768e60..faed6b1 100644
--- a/FurnitureFactory/FurnitureContracts/ViewModel/RoleViewModel.cs
+++ b/FurnitureFactory/FurnitureContracts/ViewModel/RoleViewModel.cs
@@ -3,7 +3,7 @@ using System.ComponentModel;
 
 namespace FurnitureContracts.ViewModel
 {
-    public class RoleViewModel
+    public class RoleViewModel : IRoleModel
     {
         [DisplayName("Название роли")]
         public string Name { get; set; } = string.Empty;
diff --git a/FurnitureFactory/FurnitureContracts/ViewModel/SalesSalonsViewModel.cs b/FurnitureFactory/FurnitureContracts/ViewModel/SalesSalonsViewModel.cs
index 9f45f70..e2f0189 100644
--- a/FurnitureFactory/FurnitureContracts/ViewModel/SalesSalonsViewModel.cs
+++ b/FurnitureFactory/FurnitureContracts/ViewModel/SalesSalonsViewModel.cs
@@ -3,7 +3,7 @@ using System.ComponentModel;
 
 namespace FurnitureContracts.ViewModel
 {
-    public class SalesSalonsViewModel
+    public class SalesSalonsViewModel : ISalesSalonsModel
     {
         [DisplayName("Название")]
         public string Name { get; set; } = string.Empty;