diff --git a/CHANGELOG.md b/CHANGELOG.md
index cac3b74fe716c..221692d9d9354 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Views, simplify data access and manipulation by providing a virtual layer over one or more indices ([#11957](https://github.com/opensearch-project/OpenSearch/pull/11957))
 - Add Remote Store Migration Experimental flag and allow mixed mode clusters under same ([#11986](https://github.com/opensearch-project/OpenSearch/pull/11986))
 - [Admission Control] Integrate IO Usage Tracker to the Resource Usage Collector Service and Emit IO Usage Stats ([#11880](https://github.com/opensearch-project/OpenSearch/pull/11880))
+- [Admission Control] Integrated IO Based AdmissionController to AdmissionControl Framework ([#12583](https://github.com/opensearch-project/OpenSearch/pull/12583))
 
 ### Dependencies
 - Bump `log4j-core` from 2.18.0 to 2.19.0
diff --git a/server/src/internalClusterTest/java/org/opensearch/ratelimitting/admissioncontrol/AdmissionControlMultiNodeIT.java b/server/src/internalClusterTest/java/org/opensearch/ratelimitting/admissioncontrol/AdmissionControlMultiNodeIT.java
index ff36e24b46e5e..317337ecf72c7 100644
--- a/server/src/internalClusterTest/java/org/opensearch/ratelimitting/admissioncontrol/AdmissionControlMultiNodeIT.java
+++ b/server/src/internalClusterTest/java/org/opensearch/ratelimitting/admissioncontrol/AdmissionControlMultiNodeIT.java
@@ -45,7 +45,6 @@
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.Map;
-import java.util.concurrent.ExecutionException;
 import java.util.concurrent.atomic.AtomicLong;
 import java.util.stream.Stream;
 
@@ -100,13 +99,14 @@ protected Settings nodeSettings(int nodeOrdinal) {
         return Settings.builder().put(super.nodeSettings(nodeOrdinal)).put(settings).build();
     }
 
-    public void testAdmissionControlRejectionOnEnforced() {
+    public void testAdmissionControlRejectionOnEnforced() throws Exception {
         Tuple<String, String> primaryReplicaNodeNames = getPrimaryReplicaNodeNames(INDEX_NAME);
         String primaryName = primaryReplicaNodeNames.v1();
         String replicaName = primaryReplicaNodeNames.v2();
         String coordinatingOnlyNode = getCoordinatingOnlyNode();
         AdmissionControlService admissionControlServicePrimary = internalCluster().getInstance(AdmissionControlService.class, primaryName);
         AdmissionControlService admissionControlServiceReplica = internalCluster().getInstance(AdmissionControlService.class, replicaName);
+        Thread.sleep(6000);
         final BulkRequest bulkRequest = new BulkRequest();
         for (int i = 0; i < 3; ++i) {
             IndexRequest request = new IndexRequest(INDEX_NAME).id(UUIDs.base64UUID())
@@ -196,10 +196,10 @@ public void testAdmissionControlRejectionOnEnforced() {
         }
     }
 
-    public void testAdmissionControlEnforcedOnNonACEnabledActions() throws ExecutionException, InterruptedException {
+    public void testAdmissionControlEnforcedOnNonACEnabledActions() throws Exception {
         String coordinatingOnlyNode = getCoordinatingOnlyNode();
         ClusterUpdateSettingsRequest updateSettingsRequest = new ClusterUpdateSettingsRequest();
-
+        Thread.sleep(6000);
         updateSettingsRequest.transientSettings(
             Settings.builder()
                 .put(
@@ -248,7 +248,7 @@ public void testAdmissionControlEnforcedOnNonACEnabledActions() throws Execution
         assertFalse(nodesStatsResponse.hasFailures());
     }
 
-    public void testAdmissionControlRejectionOnMonitor() {
+    public void testAdmissionControlRejectionOnMonitor() throws Exception {
         Tuple<String, String> primaryReplicaNodeNames = getPrimaryReplicaNodeNames(INDEX_NAME);
         String primaryName = primaryReplicaNodeNames.v1();
         String replicaName = primaryReplicaNodeNames.v2();
@@ -256,6 +256,7 @@ public void testAdmissionControlRejectionOnMonitor() {
 
         AdmissionControlService admissionControlServicePrimary = internalCluster().getInstance(AdmissionControlService.class, primaryName);
         AdmissionControlService admissionControlServiceReplica = internalCluster().getInstance(AdmissionControlService.class, replicaName);
+        Thread.sleep(6000);
 
         ClusterUpdateSettingsRequest updateSettingsRequest = new ClusterUpdateSettingsRequest();
 
@@ -337,7 +338,7 @@ public void testAdmissionControlRejectionOnMonitor() {
         }
     }
 
-    public void testAdmissionControlRejectionOnDisabled() {
+    public void testAdmissionControlRejectionOnDisabled() throws Exception {
         Tuple<String, String> primaryReplicaNodeNames = getPrimaryReplicaNodeNames(INDEX_NAME);
         String primaryName = primaryReplicaNodeNames.v1();
         String replicaName = primaryReplicaNodeNames.v2();
@@ -345,6 +346,7 @@ public void testAdmissionControlRejectionOnDisabled() {
 
         AdmissionControlService admissionControlServicePrimary = internalCluster().getInstance(AdmissionControlService.class, primaryName);
         AdmissionControlService admissionControlServiceReplica = internalCluster().getInstance(AdmissionControlService.class, replicaName);
+        Thread.sleep(6000);
 
         ClusterUpdateSettingsRequest updateSettingsRequest = new ClusterUpdateSettingsRequest();
 
diff --git a/server/src/main/java/org/opensearch/ratelimitting/admissioncontrol/controllers/IoBasedAdmissionController.java b/server/src/main/java/org/opensearch/ratelimitting/admissioncontrol/controllers/IoBasedAdmissionController.java
index 87b31e127c2f5..67f626696838a 100644
--- a/server/src/main/java/org/opensearch/ratelimitting/admissioncontrol/controllers/IoBasedAdmissionController.java
+++ b/server/src/main/java/org/opensearch/ratelimitting/admissioncontrol/controllers/IoBasedAdmissionController.java
@@ -23,6 +23,10 @@
 import java.util.Locale;
 import java.util.Optional;
 
+/**
+ *  Class for IO Based Admission Controller in OpenSearch, which aims to provide IO utilisation admission control.
+ *  It provides methods to apply admission control if configured limit has been reached
+ */
 public class IoBasedAdmissionController extends AdmissionController {
     public static final String IO_BASED_ADMISSION_CONTROLLER = "global_io_usage";
     private static final Logger LOGGER = LogManager.getLogger(IoBasedAdmissionController.class);
diff --git a/server/src/test/java/org/opensearch/ratelimitting/admissioncontrol/AdmissionControlSingleNodeTests.java b/server/src/test/java/org/opensearch/ratelimitting/admissioncontrol/AdmissionControlSingleNodeTests.java
index 48817c8f17346..bd209b3d2b183 100644
--- a/server/src/test/java/org/opensearch/ratelimitting/admissioncontrol/AdmissionControlSingleNodeTests.java
+++ b/server/src/test/java/org/opensearch/ratelimitting/admissioncontrol/AdmissionControlSingleNodeTests.java
@@ -77,6 +77,7 @@ protected Settings nodeSettings() {
     public void testAdmissionControlRejectionEnforcedMode() throws Exception {
         ensureGreen();
         assertBusy(() -> assertEquals(1, getInstanceFromNode(ResourceUsageCollectorService.class).getAllNodeStatistics().size()));
+        Thread.sleep(6000);
         client().admin().indices().prepareCreate("index").execute().actionGet();
         BulkRequestBuilder bulk = client().prepareBulk();
         for (int i = 0; i < 3; i++) {
@@ -200,6 +201,7 @@ public void testAdmissionControlRejectionEnforcedMode() throws Exception {
 
     public void testAdmissionControlRejectionMonitorOnlyMode() throws Exception {
         assertBusy(() -> assertEquals(1, getInstanceFromNode(ResourceUsageCollectorService.class).getAllNodeStatistics().size()));
+        Thread.sleep(6000);
         // Verify that cluster state is updated
         ActionFuture<ClusterStateResponse> future2 = client().admin().cluster().state(new ClusterStateRequest());
         assertThat(future2.isDone(), is(true));
@@ -299,6 +301,7 @@ public void testAdmissionControlRejectionMonitorOnlyMode() throws Exception {
 
     public void testAdmissionControlRejectionDisabledMode() throws Exception {
         assertBusy(() -> assertEquals(1, getInstanceFromNode(ResourceUsageCollectorService.class).getAllNodeStatistics().size()));
+        Thread.sleep(6000);
         // Verify that cluster state is updated
         ActionFuture<ClusterStateResponse> future2 = client().admin().cluster().state(new ClusterStateRequest());
         assertThat(future2.isDone(), is(true));
@@ -367,6 +370,7 @@ public void testAdmissionControlRejectionDisabledMode() throws Exception {
 
     public void testAdmissionControlWithinLimits() throws Exception {
         assertBusy(() -> assertEquals(1, getInstanceFromNode(ResourceUsageCollectorService.class).getAllNodeStatistics().size()));
+        Thread.sleep(6000);
         // Verify that cluster state is updated
         ActionFuture<ClusterStateResponse> future2 = client().admin().cluster().state(new ClusterStateRequest());
         assertThat(future2.isDone(), is(true));