The Quantity split node is used to create a split of contacts in your marketing automation program based on a specified number reaching the node first. The first X contacts to reach the node go down one route and the rest go down another route.
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This is useful if you're running a competition in your program, for instance, or only have a certain number of places available for an event or conference and have to run it on a first-come, first-served basis.

Drag and drop a quantity split node from the side panel onto the canvas, making sure that it attaches to a previous node.

Select the node to set how many contacts you'd like to go down one route, before sending the rest down the other route. A panel slides in from the right side of the screen.

To set the number of contacts, you can either use the arrow icons or type the number directly into the field.

Select APPLY when you're happy with the number.

The Quantity split node is set.

Next, you need to ensure both branch connectors are attached to the subsequent nodes you want your contacts to progress to.

In our simple example given at the top of the page, the first 1000 contacts passing through the random split node go down the route where they receive a special discount voucher code. All other contacts are sent down the other route, in which they don't receive a voucher code, and the program continues as normal.

Keep in mind that the node sends contacts down the FIRST route until the specified number of contacts pass through. After the specified number of contacts is reached, the node sends all other contacts down the REST route indefinitely.