diff --git a/src/main/java/fr/ntr/scheduler/RoundRobin.java b/src/main/java/fr/ntr/scheduler/RoundRobin.java
index 1db8218..331661f 100644
--- a/src/main/java/fr/ntr/scheduler/RoundRobin.java
+++ b/src/main/java/fr/ntr/scheduler/RoundRobin.java
@@ -1,33 +1,39 @@
 package fr.ntr.scheduler;
 import java.util.List;
-import java.util.Random;
 import fr.ntr.User;
 
 
 public class RoundRobin extends Scheduler {
 
-		private String name;
-		private int index;
-		
-		public RoundRobin(String name, int index) {
-			this.name = name;
-			this.index = index;
-		} 
-		
-		@Override
-		public void scheduling() {
-		}
-		
-		//Ts = Time Slot
-		//Sp =sous porteuse
-		private void selectionUtilisateur(int Ts, int Sp, List<User> Users) {
-			int random = new Random().nextInt(0, Users.size()-1);
-			
-			
-		}
+	private String name;
+	private int index;
 
-	
+	public RoundRobin(String name, int index) {
+		this.name = name;
+		this.index = index;
+	}
 
-		
-		
+	/**
+	 * Entry
+	 * Return
+	 */
+	@Override
+	public void scheduling() {
+		index = 0;
+
+	}
+
+	/**
+	 * Entry Time slot (int), Sous porteuse(int), and users ( List<User>)
+	 * Return the user in function of TS and SP selected
+	 */
+	private User UserSelection(int Ts, int Sp, List<User> Users) {
+		for (int i = 0; i < Ts; i++) {
+			for (int j = 0; j < Sp; j++) {
+					index++;
+			}
+		}
+		return Users.get(index%(Users.size() - 1));
+
+	}
 }