# Who goes on holiday to Sweden?

This worked example builds a Decision Tree to identify the characteristics of customers who have been on holiday to Sweden.

The Decision Tree will enable us to identify the characteristics which distinguish Swedish holiday-makers, and will turn them in to a selection rule which you could then apply to a prospect database. For example, people who go on holiday to Sweden might turn out to be, either:

- Young males of any income
- Older females who are affluent
- Middle aged people of either gender

## Setting up the Decision Tree

The main stages involved in setting up a Decision Tree are:

- Drag the Decision Tree icon from the Selection Tools to the Workspace
- [Set the Analysis Selection](<https://help.apteco.com/en/faststats/modelling/decision-tree/example/setting-the-analysis-selection/index.md>)
- [Set the Base Selection](<https://help.apteco.com/en/faststats/modelling/decision-tree/example/setting-the-base-selection/index.md>)
- [Set the Dimensions](<https://help.apteco.com/en/faststats/modelling/decision-tree/example/setting-the-dimensions/index.md>)

Having [built the tree](<https://help.apteco.com/en/faststats/modelling/decision-tree/example/building-the-tree/index.md>) you can then examine the [output at a high level](<https://help.apteco.com/en/faststats/modelling/decision-tree/example/what-does-the-output-mean/index.md>), or go in to [detail](<https://help.apteco.com/en/faststats/modelling/decision-tree/example/what-happens-at-each-split/index.md>) to understand the numbers involved and how each split has been made. [Graphical views](<https://help.apteco.com/en/faststats/modelling/decision-tree/example/graphical-views/index.md>) make the process of understanding the tree easier.

The Decision Tree will enable you to identify your [best customers](<https://help.apteco.com/en/faststats/modelling/decision-tree/example/which-are-my-best-customers/index.md>). If need be you can [refine](<https://help.apteco.com/en/faststats/modelling/decision-tree/example/modify-the-tree/index.md>) the Decision Tree which has been built

The Decision Tree will enable you to [select](<https://help.apteco.com/en/faststats/modelling/decision-tree/example/select-best-customers/index.md>) your best customers, using the selection rules to plan a [Marketing Campaign](<https://help.apteco.com/en/faststats/modelling/decision-tree/example/what-to-do-with-results/index.md>) or to just gain a better understanding of your customers.

Once you are familiar with the basic principles of the Decision Tree, you can experiment with different [build options](<https://help.apteco.com/en/faststats/modelling/decision-tree/example/reviewing-the-tree/index.md>) to tailor the Decision Tree to your data.