diff --git a/SalesPacking_MES_API_Project/OrderPackingProcessor.vbproj b/SalesPacking_MES_API_Project/OrderPackingProcessor.vbproj
index cd4580c..a594412 100644
--- a/SalesPacking_MES_API_Project/OrderPackingProcessor.vbproj
+++ b/SalesPacking_MES_API_Project/OrderPackingProcessor.vbproj
@@ -55,6 +55,11 @@
       <HintPath>..\..\..\..\..\..\..\..\Program Files\Brother bPAC3 SDK\Samples\VBNET\Badge\bin\Release\Interop.bpac.DLL</HintPath>
       <EmbedInteropTypes>True</EmbedInteropTypes>
     </Reference>
+    <Reference Include="Ivi.Visa.Interop, Version=5.11.0.0, Culture=neutral, PublicKeyToken=a128c98f1d7717c1, processorArchitecture=AMD64">
+      <SpecificVersion>False</SpecificVersion>
+      <EmbedInteropTypes>True</EmbedInteropTypes>
+      <HintPath>..\..\..\..\..\..\Windows\assembly\GAC_64\Ivi.Visa.Interop\5.11.0.0__a128c98f1d7717c1\Ivi.Visa.Interop.dll</HintPath>
+    </Reference>
     <Reference Include="Microsoft.Bcl.AsyncInterfaces, Version=8.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
       <HintPath>..\packages\Microsoft.Bcl.AsyncInterfaces.8.0.0\lib\net462\Microsoft.Bcl.AsyncInterfaces.dll</HintPath>
     </Reference>
diff --git a/SalesPacking_MES_API_Project/bin/Debug/SalesPacking_MES_API_Project.exe b/SalesPacking_MES_API_Project/bin/Debug/SalesPacking_MES_API_Project.exe
index ba3e546..edf915a 100644
Binary files a/SalesPacking_MES_API_Project/bin/Debug/SalesPacking_MES_API_Project.exe and b/SalesPacking_MES_API_Project/bin/Debug/SalesPacking_MES_API_Project.exe differ
diff --git a/SalesPacking_MES_API_Project/weightForm.vb b/SalesPacking_MES_API_Project/weightForm.vb
index c16092e..466bcb7 100644
--- a/SalesPacking_MES_API_Project/weightForm.vb
+++ b/SalesPacking_MES_API_Project/weightForm.vb
@@ -4,8 +4,8 @@ Public Class weightForm
     Private weightSum As Integer
     Private switchMotion As Boolean = False
 
-    Private weightErrorPlus As Integer
-    Private weightErrorMinus As Integer
+    'Private weightErrorPlus As Integer
+    'Private weightErrorMinus As Integer
 
 
     Private weightMode As Boolean
@@ -16,8 +16,16 @@ Public Class weightForm
     Private weightResult As Integer
     Private zeroSet As Boolean = True
 
-
     Private weight(2)
+
+    Dim weights As New List(Of Double)() ' 실측 측정값 저장용
+    Dim avg As Double = 0.0              ' 평균
+    Dim stdDev As Double = 0.0           ' 표준편차
+    Dim k As Double = 2.0                ' 오차 계수
+    Dim errorRate As Double = 0.0        ' 허용 오차 비율
+    Dim weightErrorPlus As Double = 0.0  ' 허용 오차 상한
+    Dim weightErrorMinus As Double = 0.0 ' 허용 오차 하한
+
     Private Sub weightForm_Load(sender As Object, e As EventArgs) Handles MyBase.Load
         ZeroTimer.Enabled = True
         lbNowWeight.Text = Nothing
@@ -26,11 +34,12 @@ Public Class weightForm
         lbNowWeight.Refresh()
         lbWeightEX.Refresh()
 
-        weightErrorPlus = Val(mainForm.txbWeightPlus.Text)
-        weightErrorMinus = Val(mainForm.txbWeightMinus.Text)
+        'weightErrorPlus = Val(mainForm.txbWeightPlus.Text)
+        'weightErrorMinus = Val(mainForm.txbWeightMinus.Text)
 
-        lbError.Text = "(오차: +" & weightErrorPlus & ", -" & weightErrorMinus & ")"
+        'lbError.Text = "(오차: +" & weightErrorPlus & ", -" & weightErrorMinus & ")"
 
+        lbError.Text = "(자동 오차 계산 중...)"
 
         weightResult = 0
         zeroSet = True
@@ -148,14 +157,37 @@ Public Class weightForm
         End Try
     End Sub
 
-    Private Function weight_compare() As Boolean
-        If lbNowWeight.Text >= weightSum - weightErrorMinus And lbNowWeight.Text <= weightSum + weightErrorPlus Then
-            Return True
-        Else
-            Return False
+    Private Sub UpdateErrorRange()
+        If weights.Count >= 2 Then
+            avg = weights.Average()
+            stdDev = Math.Sqrt(weights.Select(Function(x) (x - avg) ^ 2).Average())
+            errorRate = (k * stdDev) / avg
+
+            weightErrorPlus = weightSum * errorRate
+            weightErrorMinus = weightSum * errorRate
         End If
+    End Sub
+
+    'Private Function weight_compare() As Boolean
+    '    If lbNowWeight.Text >= weightSum - weightErrorMinus And lbNowWeight.Text <= weightSum + weightErrorPlus Then
+    '        Return True
+    '    Else
+    '        Return False
+    '    End If
+    'End Function
+
+    Private Function weight_compare() As Boolean
+        Dim nowWeight As Double = Double.Parse(lbNowWeight.Text)
+
+        ' 기준 무게 기반 허용 오차 범위 계산 완료된 상태에서 비교
+        Dim upperBound As Double = weightSum + weightErrorPlus
+        Dim lowerBound As Double = weightSum - weightErrorMinus
+
+        Return (nowWeight >= lowerBound) AndAlso (nowWeight <= upperBound)
     End Function
 
+
+
     Public Sub delay(ByVal milliSecond As Double)
         Dim delayTime As Date = Now.AddSeconds(milliSecond / 1000)
         Do Until Now > delayTime
@@ -179,6 +211,10 @@ Public Class weightForm
                 Next
             Loop
 
+            weights.Add(Double.Parse(weight(0)))
+            weights.Add(Double.Parse(weight(1)))
+            UpdateErrorRange()
+
             If weight(0) - weight(1) < 10 And weight(0) - weight(1) > -10 Then
                 Return True
             Else