Variable BoM

For our trial products, production need to release work order to capture the required manufacturing info (process manufacturing). However the Co-Product and Ingredients will change, depending on what type of trial item being produced. Seems like when i tested work order creation, we need to have a BoM created and then attach to the work order. This means i would need to continuously create dummy BoM and over time it would be messing up the database.

Seeking inputs from manufacturing community how they handle this in their experience. Thank You.