diff --git a/src/Smdn.Net.SkStackIP/Smdn.Net.SkStackIP/SkStackActiveScanOptions.cs b/src/Smdn.Net.SkStackIP/Smdn.Net.SkStackIP/SkStackActiveScanOptions.cs
index 57a96cd..9607cc0 100644
--- a/src/Smdn.Net.SkStackIP/Smdn.Net.SkStackIP/SkStackActiveScanOptions.cs
+++ b/src/Smdn.Net.SkStackIP/Smdn.Net.SkStackIP/SkStackActiveScanOptions.cs
@@ -86,22 +86,51 @@ public static SkStackActiveScanOptions Create(
       scanDurationGenerator: scanDurationGenerator
     );
 
+  /// <summary>
+  /// Creates the <see cref="SkStackActiveScanOptions"/> with the custom selection method and the delegate for generating duration factor.
+  /// </summary>
+  /// <param name="scanDurationGeneratorFunc">A delegate to method that iterates the scan durations.</param>
+  /// <param name="paaSelector">
+  /// A callback to select the target PAA from the PAAs found during the scan.
+  /// If <see langword="null"/>, selects the PAA which found at first during the scan.
+  /// </param>
+  public static SkStackActiveScanOptions Create(
+    Func<IEnumerable<int>> scanDurationGeneratorFunc,
+    Predicate<SkStackPanDescription>? paaSelector = null
+  )
+    => new UserDefinedActiveScanOptions(
+      paaSelector: paaSelector,
+      scanDurationGeneratorFunc: scanDurationGeneratorFunc
+    );
+
   private sealed class UserDefinedActiveScanOptions : SkStackActiveScanOptions {
     private readonly Predicate<SkStackPanDescription>? paaSelector;
-    private readonly IEnumerable<int> scanDurationGenerator;
+    private readonly Func<IEnumerable<int>> scanDurationGeneratorFunc;
 
     public UserDefinedActiveScanOptions(
       Predicate<SkStackPanDescription>? paaSelector,
       IEnumerable<int> scanDurationGenerator
     )
+    {
+      if (scanDurationGenerator is null)
+        throw new ArgumentNullException(nameof(scanDurationGenerator));
+
+      this.paaSelector = paaSelector;
+      this.scanDurationGeneratorFunc = new(() => scanDurationGenerator);
+    }
+
+    public UserDefinedActiveScanOptions(
+      Predicate<SkStackPanDescription>? paaSelector,
+      Func<IEnumerable<int>> scanDurationGeneratorFunc
+    )
     {
       this.paaSelector = paaSelector;
-      this.scanDurationGenerator = scanDurationGenerator ?? throw new ArgumentNullException(nameof(scanDurationGenerator));
+      this.scanDurationGeneratorFunc = scanDurationGeneratorFunc ?? throw new ArgumentNullException(nameof(scanDurationGeneratorFunc));
     }
 
-    public override SkStackActiveScanOptions Clone() => new UserDefinedActiveScanOptions(paaSelector, scanDurationGenerator.ToArray());
+    public override SkStackActiveScanOptions Clone() => new UserDefinedActiveScanOptions(paaSelector, scanDurationGeneratorFunc);
     internal override bool SelectPanaAuthenticationAgent(SkStackPanDescription desc) => paaSelector?.Invoke(desc) ?? true;
-    internal override IEnumerable<int> YieldScanDurationFactors() => scanDurationGenerator;
+    internal override IEnumerable<int> YieldScanDurationFactors() => scanDurationGeneratorFunc();
   }
 
   /// <summary>
@@ -120,22 +149,50 @@ PhysicalAddress paaMacAddress
       scanDurationGenerator: scanDurationGenerator
     );
 
+  /// <summary>
+  /// Creates the <see cref="SkStackActiveScanOptions"/> with the custom selection method and the delegate for generating duration factor.
+  /// </summary>
+  /// <param name="scanDurationGeneratorFunc">A delegate to method that iterates the scan durations.</param>
+  /// <param name="paaMacAddress">
+  /// A <see cref="PhysicalAddress"/> of the target PAA. This method selects the first PAA found during the scan that matches this <see cref="PhysicalAddress"/>.
+  /// </param>
+  public static SkStackActiveScanOptions Create(
+    Func<IEnumerable<int>> scanDurationGeneratorFunc,
+    PhysicalAddress paaMacAddress
+  )
+    => new FindByMacAddressActiveScanOptions(
+      paaMacAddress: paaMacAddress,
+      scanDurationGeneratorFunc: scanDurationGeneratorFunc
+    );
+
   private sealed class FindByMacAddressActiveScanOptions : SkStackActiveScanOptions {
     private readonly PhysicalAddress paaMacAddress;
-    private readonly IEnumerable<int> scanDurationGenerator;
+    private readonly Func<IEnumerable<int>> scanDurationGeneratorFunc;
 
     public FindByMacAddressActiveScanOptions(
       PhysicalAddress paaMacAddress,
       IEnumerable<int> scanDurationGenerator
     )
+    {
+      if (scanDurationGenerator is null)
+        throw new ArgumentNullException(nameof(scanDurationGenerator));
+
+      this.paaMacAddress = paaMacAddress;
+      scanDurationGeneratorFunc = new(() => scanDurationGenerator);
+    }
+
+    public FindByMacAddressActiveScanOptions(
+      PhysicalAddress paaMacAddress,
+      Func<IEnumerable<int>> scanDurationGeneratorFunc
+    )
     {
       this.paaMacAddress = paaMacAddress;
-      this.scanDurationGenerator = scanDurationGenerator ?? throw new ArgumentNullException(nameof(scanDurationGenerator));
+      this.scanDurationGeneratorFunc = scanDurationGeneratorFunc ?? throw new ArgumentNullException(nameof(scanDurationGeneratorFunc));
     }
 
-    public override SkStackActiveScanOptions Clone() => new FindByMacAddressActiveScanOptions(paaMacAddress, scanDurationGenerator.ToArray());
+    public override SkStackActiveScanOptions Clone() => new FindByMacAddressActiveScanOptions(paaMacAddress, scanDurationGeneratorFunc);
     internal override bool SelectPanaAuthenticationAgent(SkStackPanDescription desc) => desc.MacAddress.Equals(paaMacAddress);
-    internal override IEnumerable<int> YieldScanDurationFactors() => scanDurationGenerator;
+    internal override IEnumerable<int> YieldScanDurationFactors() => scanDurationGeneratorFunc();
   }
 
   /*
diff --git a/tests/Smdn.Net.SkStackIP/Smdn.Net.SkStackIP/SkStackActiveScanOptions.cs b/tests/Smdn.Net.SkStackIP/Smdn.Net.SkStackIP/SkStackActiveScanOptions.cs
index 069165c..de50a80 100644
--- a/tests/Smdn.Net.SkStackIP/Smdn.Net.SkStackIP/SkStackActiveScanOptions.cs
+++ b/tests/Smdn.Net.SkStackIP/Smdn.Net.SkStackIP/SkStackActiveScanOptions.cs
@@ -51,4 +51,29 @@ public void YieldScanDurationFactors_Create_ScanDurationGenerator_WithPaaMacAddr
       () => TestYieldScanDurationFactors(SkStackActiveScanOptions.Create(scanDurationFactors!, paaMacAddress: PhysicalAddress.None), scanDurationFactors!),
       typeOfExpectedException is null ? Throws.Nothing : Throws.TypeOf(typeOfExpectedException)
     );
+
+  [Test]
+  public void YieldScanDurationFactors_Create_ScanDurationGeneratorFunc_ArgumentNull()
+  {
+    Assert.That(() => SkStackActiveScanOptions.Create(scanDurationGeneratorFunc: null!, paaSelector: null), Throws.ArgumentNullException);
+    Assert.That(() => SkStackActiveScanOptions.Create(scanDurationGeneratorFunc: null!, paaMacAddress: PhysicalAddress.None), Throws.ArgumentNullException);
+  }
+
+  [TestCase(new int[0])]
+  [TestCase(new int[] { 1 })]
+  [TestCase(new int[] { 1, 2, 3, 4, 5 })]
+  public void YieldScanDurationFactors_Create_ScanDurationGeneratorFunc_WithPaaSelector(int[] scanDurationFactors)
+    => Assert.That(
+      () => TestYieldScanDurationFactors(SkStackActiveScanOptions.Create(scanDurationGeneratorFunc: () => scanDurationFactors, paaSelector: null), scanDurationFactors!),
+      Throws.Nothing
+    );
+
+  [TestCase(new int[0])]
+  [TestCase(new int[] { 1 })]
+  [TestCase(new int[] { 1, 2, 3, 4, 5 })]
+  public void YieldScanDurationFactors_Create_ScanDurationGeneratorFunc_WithPaaMacAddress(int[] scanDurationFactors)
+    => Assert.That(
+      () => TestYieldScanDurationFactors(SkStackActiveScanOptions.Create(scanDurationGeneratorFunc: () => scanDurationFactors, paaMacAddress: PhysicalAddress.None), scanDurationFactors!),
+      Throws.Nothing
+    );
 }