diff --git a/yavscModel/WorkFlow/Automate.cs b/yavscModel/WorkFlow/Automate.cs
new file mode 100644
index 00000000..f2b06140
--- /dev/null
+++ b/yavscModel/WorkFlow/Automate.cs
@@ -0,0 +1,160 @@
+//
+//  Automate.cs
+//
+//  Author:
+//       Paul Schneider <paulschneider@free.fr>
+//
+//  Copyright (c) 2015 Paul Schneider
+//
+//  This program is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU Lesser General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU Lesser General Public License for more details.
+//
+//  You should have received a copy of the GNU Lesser General Public License
+//  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+using System;
+using System.Collections.Generic;
+
+namespace Yavsc.Model.WorkFlow
+{
+	/// <summary>
+	/// Automate.
+	/// </summary>
+	public class Automate
+	{
+		/// <summary>
+		/// Initializes a new instance of the <see cref="Yavsc.Model.WorkFlow.Automate"/> class.
+		/// </summary>
+		public Automate ()
+		{
+
+		}
+
+		private List<IEquatable<long>> eventids = 
+			new List<IEquatable<long>>();
+		private List<IEquatable<long>> stateids = 
+			new List<IEquatable<long>>();
+		private IEquatable<long> startingstateid ;
+		private List<IEquatable<long>> endingstateids = 
+			new List<IEquatable<long>>();
+		private Dictionary<IEquatable<long>,Dictionary<IEquatable<long>,IEquatable<long>>> transitions =
+			new Dictionary<IEquatable<long>, Dictionary<IEquatable<long>, IEquatable<long>>>();
+
+		/// <summary>
+		/// Sets the state of the starting.
+		/// </summary>
+		/// <param name="startingStateId">Starting state identifier.</param>
+		public void SetStartingState(IEquatable<long> startingStateId)
+		{
+			if (endingstateids.Contains (startingStateId))
+				throw new InvalidOperationException ("endingstateids.Contains (startingStateId)");
+			if (!stateids.Contains (startingStateId))
+				stateids.Add (startingStateId);
+			startingstateid = startingStateId;
+		}
+
+		/// <summary>
+		/// Sets the state of the ending.
+		/// </summary>
+		/// <param name="endingStateId">Ending state identifier.</param>
+		public void SetEndingState(IEquatable<long> endingStateId)
+		{
+
+			if (startingstateid==endingStateId)
+				throw new InvalidOperationException ("startingstateid==endingStateId");
+			if (!stateids.Contains (endingStateId))
+				stateids.Add (endingStateId);
+			if (!endingstateids.Contains (endingStateId))
+				endingstateids.Add (endingStateId);
+		}
+
+
+		/// <summary>
+		/// Adds the transition.
+		/// </summary>
+		/// <param name="startingStateId">Starting state identifier.</param>
+		/// <param name="endingStateId">Ending state identifier.</param>
+		/// <param name="eventId">Event identifier.</param>
+		public void AddTransition(
+			IEquatable<long> startingStateId, 
+			IEquatable<long> endingStateId, 
+			IEquatable<long> eventId)
+		{
+			if (!stateids.Contains (startingStateId))
+				stateids.Add (startingStateId);
+			if (!stateids.Contains (endingStateId))
+				stateids.Add (endingStateId);
+
+			Dictionary<IEquatable<long>,IEquatable<long>> currentNode = transitions [startingStateId];
+			if (currentNode == null) {
+				transitions.Add(
+					startingStateId,
+					currentNode = 
+					new Dictionary<IEquatable<long>, IEquatable<long>> ());
+			}
+			currentNode [eventId] = endingStateId;
+			if (!eventids.Contains (eventId))
+				eventids.Add (eventId);
+		}
+
+		/// <summary>
+		/// Gets or sets the state.
+		/// </summary>
+		/// <value>The state.</value>
+		public IEquatable<long> State { get; set; }
+
+		/// <summary>
+		/// Move this instance according the specified eventId.
+		/// </summary>
+		/// <param name="eventId">Event identifier.</param>
+		public void Move(IEquatable<long> eventId)
+		{
+			if (State == null)
+				throw new InvalidOperationException ("Set the current state or reset the automate before");
+			Dictionary<IEquatable<long>,IEquatable<long>> node = transitions [State];
+			if (node == null) // no transition found
+				return;
+			IEquatable<long> nextState = node [eventId];
+			if (nextState == null) // no transition found for this event
+				return;
+			State = nextState;
+		}
+
+		/// <summary>
+		/// Reset the state of this automate to the starting state
+		/// </summary>
+		public void Reset()
+		{
+			State = startingstateid;
+		}
+
+		/// <summary>
+		/// Clear all valid transitions from this automate,
+		/// reset all of its properties
+		/// </summary>
+		public void FactoryReset() {
+			State = null;
+			startingstateid = null;
+			endingstateids.Clear ();
+			eventids.Clear ();
+			transitions.Clear ();
+		}
+
+		/// <summary>
+		/// Determines whether this instance is in final state.
+		/// </summary>
+		/// <returns><c>true</c> if this instance is in final state; otherwise, <c>false</c>.</returns>
+		public bool IsInFinalState()
+		{
+			return endingstateids.Contains (State);
+		}
+	}
+
+}
+
diff --git a/yavscModel/YavscModel.csproj b/yavscModel/YavscModel.csproj
index 89b22627..f20b656d 100644
--- a/yavscModel/YavscModel.csproj
+++ b/yavscModel/YavscModel.csproj
@@ -138,6 +138,7 @@
     <Compile Include="FrontOffice\Catalog\Billing\SetPrice.cs" />
     <Compile Include="FrontOffice\Catalog\Billing\Price.cs" />
     <Compile Include="OtherWebException.cs" />
+    <Compile Include="WorkFlow\Automate.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <ItemGroup>