# Tutorial Exercise 1.1

## Exercise Information

Four wagons are parked 300 meters away from a station, we need to send a locomotive there in order to bring those wagons back to the station. The locomotive has a maximum speed of 8 m/s when uncoupled and a maximum speed of 4 m/s when coupled. The path from the station to the wagons is a straight rail. Create a model that represents this problem.

## Step 1Creating objects

In order to achieve the solution for the problem, you should create the following objects:

• Create one SourceTrain.
• Create three Rails, then resize Rail2 xvalue to 300. Connect the SourceTrain to the Rail1 (using the A key) and then connect Rail1 to Rail2 and Rail2 to Rail3 via proximity.
• Create a RailControlPoint and place it on Rail3. The RailControlPoint should change color if it is connected correctly to the Rail. We recommend the creation of the RailControlPoint in a empty space and, after that, you can place it on the Rail.

Your model should be looking like this:

## Step 2Processflow Configuration

In order to achieve the solution for the problem, you should create the following processflow tasks:

• Create a Schedule Source.
• Create a "CreateTrain" and a "CreateWagon" activities.
• Create a "MoveTrain" activity.
• Create a "CoupleWagon" activity.
• Create a "MoveTrain" activity.
• Create a Sink.

Your processflow should be looking like this:

To configure your processflow tasks follow the steps:

• On "CreateTrain" activity, point the "Source Train" reference to your SourceTrain, set the "Locomotive Uncoupled" to 8 and set the "Locomotive Coupled" to 4.
• On "CreateWagon" activity, point the "Control Point" reference to the RailControlPoint on Rail3 and set wagons quantity to 4.
• On "MoveTrain" activity, set train reference to "token.train" and destiny to the RailControlPoint on Rail3.
• On "CoupleWagon" activity, set train reference to "token.train" and wagon reference to "token.wagon".
• On "MoveTrain" activity, set train reference to "token.train" and destiny to Rail1.

With this configuration your model is ready.