Scheduling Method Selection on Production Order Maintenance screen

Hi ​@apallawala22 

There is no setting that changes the default value in this box, so it requires a small customization.
I've generated code for you with AI. It might not be perfect, but it works the way you need.

using PX.Data;
using PX.Objects.AM;
using PX.Objects.CS;

namespace VB.Manufacturing
{
    public class ProdMaintExt : PXGraphExtension<ProdMaint>
    {
        public static bool IsActive() =>
            PXAccess.FeatureInstalled<FeaturesSet.manufacturing>();

        protected virtual void _(Events.FieldDefaulting<AMProdItem, AMProdItem.schedulingMethod> e)
        {
            if (e.Row == null) return;

            e.NewValue = "F";   // ScheduleMethod.FinishOn
            e.Cancel = true;    // skip the standard PXDefault source
        }
    }
}

You need to create a package and add a code file to it, then replace its content with the code from above.
Or you can use the attached package, where I did exactly the same for testing.