diff --git a/patterns-modules/idd/README.md b/patterns-modules/idd/README.md
new file mode 100644
index 0000000000..e320af31b4
--- /dev/null
+++ b/patterns-modules/idd/README.md
@@ -0,0 +1 @@
+### Relevant Articles:
\ No newline at end of file
diff --git a/patterns-modules/idd/pom.xml b/patterns-modules/idd/pom.xml
new file mode 100644
index 0000000000..02795089e0
--- /dev/null
+++ b/patterns-modules/idd/pom.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>idd</artifactId>
+    <version>1.0</version>
+    <name>idd</name>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>9</source>
+                    <target>9</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+    <packaging>jar</packaging>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>patterns-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+
+</project>
\ No newline at end of file
diff --git a/patterns-modules/idd/src/main/java/com/baeldung/idd/CreateHelpRequestDTO.java b/patterns-modules/idd/src/main/java/com/baeldung/idd/CreateHelpRequestDTO.java
new file mode 100644
index 0000000000..87084474db
--- /dev/null
+++ b/patterns-modules/idd/src/main/java/com/baeldung/idd/CreateHelpRequestDTO.java
@@ -0,0 +1,15 @@
+package com.baeldung.idd;
+
+public class CreateHelpRequestDTO {
+
+    private final HelpRequestStatus status;
+
+    public CreateHelpRequestDTO(HelpRequestStatus status) {
+        this.status = status;
+    }
+
+    public HelpRequestStatus getStatus() {
+        return status;
+    }
+
+}
diff --git a/patterns-modules/idd/src/main/java/com/baeldung/idd/HelpRequestDTO.java b/patterns-modules/idd/src/main/java/com/baeldung/idd/HelpRequestDTO.java
new file mode 100644
index 0000000000..2ad0c5f100
--- /dev/null
+++ b/patterns-modules/idd/src/main/java/com/baeldung/idd/HelpRequestDTO.java
@@ -0,0 +1,13 @@
+package com.baeldung.idd;
+
+public class HelpRequestDTO {
+    private HelpRequestStatus status;
+
+    public HelpRequestStatus getStatus() {
+        return status;
+    }
+
+    public HelpRequestDTO(HelpRequestStatus status) {
+        this.status = status;
+    }
+}
diff --git a/patterns-modules/idd/src/main/java/com/baeldung/idd/HelpRequestService.java b/patterns-modules/idd/src/main/java/com/baeldung/idd/HelpRequestService.java
new file mode 100644
index 0000000000..02c0b2531c
--- /dev/null
+++ b/patterns-modules/idd/src/main/java/com/baeldung/idd/HelpRequestService.java
@@ -0,0 +1,11 @@
+package com.baeldung.idd;
+
+import java.util.List;
+
+public interface HelpRequestService {
+    HelpRequestDTO createHelpRequest(CreateHelpRequestDTO createHelpRequestDTO);
+
+    List<HelpRequestDTO> findAllByStatus(HelpRequestStatus status);
+
+    HelpRequestDTO updateHelpRequest(UpdateHelpRequestDTO updateHelpRequestDTO);
+}
diff --git a/patterns-modules/idd/src/main/java/com/baeldung/idd/HelpRequestServiceImpl.java b/patterns-modules/idd/src/main/java/com/baeldung/idd/HelpRequestServiceImpl.java
new file mode 100644
index 0000000000..8ffed62078
--- /dev/null
+++ b/patterns-modules/idd/src/main/java/com/baeldung/idd/HelpRequestServiceImpl.java
@@ -0,0 +1,24 @@
+package com.baeldung.idd;
+
+import java.util.List;
+
+public class HelpRequestServiceImpl implements HelpRequestService {
+
+    @Override
+    public HelpRequestDTO createHelpRequest(CreateHelpRequestDTO createHelpRequestDTO) {
+        // here goes the implementation
+        return new HelpRequestDTO(createHelpRequestDTO.getStatus());
+    }
+
+    @Override
+    public List<HelpRequestDTO> findAllByStatus(HelpRequestStatus status) {
+        // here goes the implementation
+        return List.of(new HelpRequestDTO(status), new HelpRequestDTO(status));
+    }
+
+    @Override
+    public HelpRequestDTO updateHelpRequest(UpdateHelpRequestDTO updateHelpRequestDTO) {
+        // here goes the implementation
+        return new HelpRequestDTO(updateHelpRequestDTO.getStatus());
+    }
+}
diff --git a/patterns-modules/idd/src/main/java/com/baeldung/idd/HelpRequestStatus.java b/patterns-modules/idd/src/main/java/com/baeldung/idd/HelpRequestStatus.java
new file mode 100644
index 0000000000..adb2fb5cc3
--- /dev/null
+++ b/patterns-modules/idd/src/main/java/com/baeldung/idd/HelpRequestStatus.java
@@ -0,0 +1,6 @@
+package com.baeldung.idd;
+
+public enum HelpRequestStatus {
+    OPEN, IN_PROGRESS, CLOSED
+}
+
diff --git a/patterns-modules/idd/src/main/java/com/baeldung/idd/UpdateHelpRequestDTO.java b/patterns-modules/idd/src/main/java/com/baeldung/idd/UpdateHelpRequestDTO.java
new file mode 100644
index 0000000000..04a46e3d27
--- /dev/null
+++ b/patterns-modules/idd/src/main/java/com/baeldung/idd/UpdateHelpRequestDTO.java
@@ -0,0 +1,14 @@
+package com.baeldung.idd;
+
+public class UpdateHelpRequestDTO {
+
+    private final HelpRequestStatus status;
+
+    public UpdateHelpRequestDTO(HelpRequestStatus status) {
+        this.status = status;
+    }
+
+    public HelpRequestStatus getStatus() {
+        return status;
+    }
+}
diff --git a/patterns-modules/idd/src/test/java/com/baeldung/idd/HelpRequestServiceUnitTest.java b/patterns-modules/idd/src/test/java/com/baeldung/idd/HelpRequestServiceUnitTest.java
new file mode 100644
index 0000000000..7bfacf8a48
--- /dev/null
+++ b/patterns-modules/idd/src/test/java/com/baeldung/idd/HelpRequestServiceUnitTest.java
@@ -0,0 +1,47 @@
+package com.baeldung.idd;
+
+import org.assertj.core.api.Assertions;
+import org.junit.Test;
+
+import java.util.List;
+
+public class HelpRequestServiceUnitTest {
+
+    HelpRequestService testHelpRequestService = new HelpRequestService() {
+        @Override
+        public HelpRequestDTO createHelpRequest(CreateHelpRequestDTO createHelpRequestDTO) {
+            return new HelpRequestDTO(HelpRequestStatus.OPEN);
+        }
+
+        @Override
+        public List<HelpRequestDTO> findAllByStatus(HelpRequestStatus status) {
+            return List.of(new HelpRequestDTO(HelpRequestStatus.OPEN));
+        }
+
+        @Override
+        public HelpRequestDTO updateHelpRequest(UpdateHelpRequestDTO updateHelpRequestDTO) {
+            return new HelpRequestDTO(HelpRequestStatus.OPEN);
+        }
+    };
+
+    @Test
+    public void givenHelpRequest_whenCreateHelpRequest_thenHelpRequestIsCreated() {
+        // given
+        CreateHelpRequestDTO createHelpRequestDTO = new CreateHelpRequestDTO(HelpRequestStatus.OPEN);
+
+        // when
+        HelpRequestDTO helpRequestDTO = testHelpRequestService.createHelpRequest(createHelpRequestDTO);
+
+        // then
+        Assertions.assertThat(helpRequestDTO).isNotNull();
+        Assertions.assertThat(helpRequestDTO.getStatus()).isEqualTo(HelpRequestStatus.OPEN);
+    }
+
+    @Test
+    public void givenHelpRequestList_whenFindAllByStatus_shouldContainOnlyStatus() {
+        HelpRequestService helpRequestService = new HelpRequestServiceImpl();
+        List<HelpRequestDTO> allByStatusOpen = helpRequestService.findAllByStatus(HelpRequestStatus.OPEN);
+        Assertions.assertThat(allByStatusOpen).extracting(HelpRequestDTO::getStatus).containsOnly(HelpRequestStatus.OPEN);
+    }
+
+}
diff --git a/patterns-modules/pom.xml b/patterns-modules/pom.xml
index 26d9a76aee..5a99b539be 100644
--- a/patterns-modules/pom.xml
+++ b/patterns-modules/pom.xml
@@ -31,6 +31,7 @@
         <module>clean-architecture</module>
         <module>enterprise-patterns</module>
         <module>coupling</module>
+        <module>idd</module>
     </modules>
 
     <dependencyManagement>
@@ -71,4 +72,4 @@
         <jetty-maven-plugin.version>9.4.0.v20161208</jetty-maven-plugin.version>
     </properties>
 
-</project>
\ No newline at end of file
+</project>