This section provides a step-by-step description of a simple CTA data analysis example using the ctools. In this example we will simulate a half an hour long CTA observation of the Crab nebula as the single point source within the CTA field of view. You will learn how to bin the event data into a counts cube and how to fit a spatial and spectral model to the data. You will also learn how to analyse directly event lists without binning the events into a counts cube. We will show how you can create a butterfly diagram that shows the confidence band of the fitted spectral model. And you will learn how to take energy dispersion into account.