Non Shippable Item Process

Hi,

We are selling devices and services. Both are defined as items.

Devices are inventory item and services are non inventory and non-shippable items.

Currently as soon as we enter items; inventory item is waiting for further process while service item gets process upto waiting for AR interface.

We want to process sales order in a way that service item will only process after device item is processed.

Is there a way to do this setup ?

Regards.