How to allow OM to partially reserve an order line without GOP setup

Summary:

We are currently utilizing a custom orchestration process that excludes the "Schedule" step, as there are no GOP or ATP requirements in our setup. However, we would like to enable line splitting and reserve available on-hand quantities to facilitate partial shipments, with the remaining quantities being backordered. While I have come across solutions tailored for GOP-enabled configurations, I would appreciate guidance on how to achieve this functionality in a non-GOP environment

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