diff --git a/AsbCloudInfrastructure/Background/BackgroundWorker.cs b/AsbCloudInfrastructure/Background/BackgroundWorker.cs
index f56b0ae4..825f1b66 100644
--- a/AsbCloudInfrastructure/Background/BackgroundWorker.cs
+++ b/AsbCloudInfrastructure/Background/BackgroundWorker.cs
@@ -54,6 +54,7 @@ public class BackgroundWorker : BackgroundService
 
     protected override async Task ExecuteAsync(CancellationToken token)
     {
+        Trace.TraceInformation($"{GetType().Name} started");
         while (!token.IsCancellationRequested && works.TryDequeue(out CurrentWork))
         {
             try
diff --git a/AsbCloudInfrastructure/Background/PeriodicBackgroundWorker.cs b/AsbCloudInfrastructure/Background/PeriodicBackgroundWorker.cs
index a7490ed7..dedd6d83 100644
--- a/AsbCloudInfrastructure/Background/PeriodicBackgroundWorker.cs
+++ b/AsbCloudInfrastructure/Background/PeriodicBackgroundWorker.cs
@@ -42,6 +42,7 @@ public class PeriodicBackgroundWorker : BackgroundService
 
     protected override async Task ExecuteAsync(CancellationToken token)
     {
+        Trace.TraceInformation($"{GetType().Name} started");
         while (!token.IsCancellationRequested)
         {
             try
diff --git a/AsbCloudInfrastructure/Services/Subsystems/WorkSubsystemOperationTimeCalc.cs b/AsbCloudInfrastructure/Services/Subsystems/WorkSubsystemOperationTimeCalc.cs
index 7da8051d..9dd827ba 100644
--- a/AsbCloudInfrastructure/Services/Subsystems/WorkSubsystemOperationTimeCalc.cs
+++ b/AsbCloudInfrastructure/Services/Subsystems/WorkSubsystemOperationTimeCalc.cs
@@ -55,10 +55,12 @@ public class WorkSubsystemOperationTimeCalc : Work
                 {
                     IdTelemetry = outer,
                     inner.SingleOrDefault()?.LastDate,
-                });
+                })
+            .OrderByDescending(i => i.IdTelemetry);
 
         var count = telemetryLastDetectedDates.Count();
         var i = 0d;
+
         foreach (var item in telemetryLastDetectedDates)
         {
             onProgressCallback($"Start handling telemetry: {item.IdTelemetry} from {item.LastDate}", i++ / count);
diff --git a/AsbCloudInfrastructure/Startup.cs b/AsbCloudInfrastructure/Startup.cs
index 64191e5e..8661c651 100644
--- a/AsbCloudInfrastructure/Startup.cs
+++ b/AsbCloudInfrastructure/Startup.cs
@@ -1,8 +1,6 @@
-using AsbCloudApp.Services;
-using AsbCloudDb.Model;
+using AsbCloudDb.Model;
 using AsbCloudInfrastructure.Services.DetectOperations;
 using AsbCloudInfrastructure.Services;
-using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
 using System;
@@ -10,10 +8,7 @@ using System.Threading.Tasks;
 using System.Threading;
 using AsbCloudInfrastructure.Background;
 using AsbCloudApp.Data.SAUB;
-using AsbCloudInfrastructure.Services.SAUB;
 using AsbCloudInfrastructure.Services.Subsystems;
-using System.Linq;
-using DocumentFormat.OpenXml.InkML;
 using AsbCloudDb;
 using AsbCloudApp.Repositories;