diff --git a/Factory/FactoryDataModels/Models/IExecutionPhaseModel.cs b/Factory/FactoryDataModels/Models/IExecutionPhaseModel.cs
index 704fb19..26a56cb 100644
--- a/Factory/FactoryDataModels/Models/IExecutionPhaseModel.cs
+++ b/Factory/FactoryDataModels/Models/IExecutionPhaseModel.cs
@@ -1,5 +1,4 @@
-
-using FactoryDataModels.Enums;
+using FactoryDataModels.Enums;
 
 namespace FactoryDataModels.Models
 {
diff --git a/Factory/FactoryDataModels/Models/IMachineModel.cs b/Factory/FactoryDataModels/Models/IMachineModel.cs
new file mode 100644
index 0000000..b27f067
--- /dev/null
+++ b/Factory/FactoryDataModels/Models/IMachineModel.cs
@@ -0,0 +1,13 @@
+namespace FactoryDataModels.Models
+{
+    public interface IMachineModel : IId
+    {
+        string Name { get; set; }
+
+        DateTime ExploitationStartDate { get; set; }
+
+        int Lifetime { get; set; }
+
+        int ClientId { get; set; }
+    }
+}
diff --git a/Factory/FactoryDataModels/Models/IProductModel.cs b/Factory/FactoryDataModels/Models/IProductModel.cs
new file mode 100644
index 0000000..f05cb35
--- /dev/null
+++ b/Factory/FactoryDataModels/Models/IProductModel.cs
@@ -0,0 +1,13 @@
+namespace FactoryDataModels.Models
+{
+    public interface IProductModel : IId
+    {
+        string Name { get; set; }
+
+        double Price { get; set; }
+
+        int ClientId { get; set; }
+
+        int RequirementId { get; set; }
+    }
+}
diff --git a/Factory/FactoryDataModels/Models/IRequirementModel.cs b/Factory/FactoryDataModels/Models/IRequirementModel.cs
new file mode 100644
index 0000000..02e8da1
--- /dev/null
+++ b/Factory/FactoryDataModels/Models/IRequirementModel.cs
@@ -0,0 +1,13 @@
+namespace FactoryDataModels.Models
+{
+    public interface IRequirementModel : IId
+    {
+        string Name { get; set; }
+
+        string Description { get; set; }
+
+        int Lifetime { get; set; }
+
+        int ClientId { get; set; }
+    }
+}
diff --git a/Factory/FactoryDataModels/Models/IWorkpieceModel.cs b/Factory/FactoryDataModels/Models/IWorkpieceModel.cs
index e2e7131..7006d24 100644
--- a/Factory/FactoryDataModels/Models/IWorkpieceModel.cs
+++ b/Factory/FactoryDataModels/Models/IWorkpieceModel.cs
@@ -10,6 +10,6 @@
 
         int ClientId { get; }
 
-        //Dictionary<int, (IProductModel, int)> WorkpieceProducts { get; }
+        Dictionary<int, (IProductModel, int)> WorkpieceProducts { get; }
     }
 }
\ No newline at end of file