diff --git a/AsbCloudApp/Data/Subsystems/SubsystemStatDto.cs b/AsbCloudApp/Data/Subsystems/SubsystemStatDto.cs
index d86c6bb3..c00a06ed 100644
--- a/AsbCloudApp/Data/Subsystems/SubsystemStatDto.cs
+++ b/AsbCloudApp/Data/Subsystems/SubsystemStatDto.cs
@@ -23,8 +23,13 @@ namespace AsbCloudApp.Data.Subsystems
         /// </summary>
         public double KUsage { get; set; }
         /// <summary>
-        /// коэффициент применения
+        /// сумма изменения глубин
         /// </summary>
-        public double K2 { get; set; }
+        public double SumDepthChange { get; set; }
+        /// <summary>
+        /// количество операций
+        /// </summary>
+        public int OperationCount { get; set; }
+        
     }
 }
diff --git a/AsbCloudInfrastructure/Services/Subsystems/SubsystemOperationTimeService.cs b/AsbCloudInfrastructure/Services/Subsystems/SubsystemOperationTimeService.cs
index 9bfe0b85..8f24bcdc 100644
--- a/AsbCloudInfrastructure/Services/Subsystems/SubsystemOperationTimeService.cs
+++ b/AsbCloudInfrastructure/Services/Subsystems/SubsystemOperationTimeService.cs
@@ -122,19 +122,63 @@ namespace AsbCloudInfrastructure.Services.Subsystems
             var result = groupedDataSubsystems.Select(item =>
             {
                 var periodGroup = item.Sum(o => (o.DateEnd - o.DateStart).TotalHours);
+                var periodGroupDepth = item.Sum(o => o.DepthEnd - o.DepthStart);
+                var depthChange = GetDepthChange(item.Key, gtDate, ltDate);
                 var subsystemStat = new SubsystemStatDto()
                 {
                     IdSubsystem = item.Key,
                     SubsystemName = subsystemService.GetOrDefault(item.Key)?.Name ?? "unknown",
                     UsedTimeHours = periodGroup,
-                    KUsage = 1d * periodGroup / periodRequest,
-                    K2 = 1d * periodGroup / periodGroupTotal,
+                    //условие добавлено что бы избежать деление на ноль
+                    //чисто теоретически такое событие может произойти только в случае
+                    //если не было определенных операций по какому то из режимов
+                    // тогда в этом поле статистики будет null
+                    KUsage = depthChange==0? double.NaN : periodGroupDepth / depthChange,
+                    SumDepthChange = periodGroupDepth,
+                    OperationCount = item.Count()                    
                 };
                 return subsystemStat;
             });
 
             return result;
         }
+        private double GetDepthChange (int idSubsystem, DateTime gtDate, DateTime ltDate)
+        {
+            double depthChange = 0;
+            var detectOperations = db.DetectedOperations
+                     .Where(a => a.DateStart >= gtDate & a.DateEnd <= ltDate)
+                     .ToList();
+            //AKB - Rotor+Slide
+            if (idSubsystem == 1)
+            {                
+                depthChange = detectOperations.Where(a => a.IdCategory == 1 & a.IdCategory == 3)
+                    .Sum(o => o.DepthEnd - o.DepthStart);
+                return depthChange;
+            }
+            //Mse - all detect operations
+            if (idSubsystem == 2)
+            {                
+                depthChange = detectOperations                    
+                    .Sum(o => o.DepthEnd - o.DepthStart);
+                return depthChange;
+            }
+            //Slide
+            if (idSubsystem == 65536)
+            {                
+                depthChange = detectOperations.Where(o => o.IdCategory == 3)
+                    .Sum(o => o.DepthEnd - o.DepthStart);
+                return depthChange;
+            }
+            //Rotor
+            if (idSubsystem == 65537)
+            {
+                depthChange = detectOperations.Where(o => o.IdCategory == 1)
+                    .Sum(o => o.DepthEnd - o.DepthStart);
+                return depthChange;
+            }
+
+            return depthChange;
+        }
 
         private IQueryable<SubsystemOperationTime>? BuildQuery(SubsystemOperationTimeRequest request)
         {