WTpart subtype assigning while check in

How do I assign the sub Type of the WTPart that the EPMDocument will create and associate during Checkin? One way is to use a subtype of the epmdocument itself and assign "Default part type to Create", but I dont want to take this option. Kindly pour in your thoughts.

Iam using Windchill 10.2 with Creo 2.0.

For some assemblies , when checked in, i want to create Part subtype A, while for some other assemblies I want to create Part type B.

There is a clear rule for this on what conditions Part Subtype A or B should be created, but there seems to be no direct way to specify (as an attribute ).

Are there any preferences?

Thanks & Regards

Hari Varadharajan