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# How do I specify the train/validation/test splits?

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In some scenarios, you may want to specify your train/validation/test splits. For example, you may need to enforce additional constraints required by your organization, like ensuring that there is a sufficiently large gap between the training dataset and the holdout dataset.

Kumo’s model planner allows you to easily control your data split strategy. You can specify a custom split method and parameter to generate a training, validation, and holdout set by setting the split value in the `Model Plan` box.

* [Model Planner](https://kumo.ai/docs/model-planner/)
* [split](https://kumo.ai/docs/reference/split/)