An acoustic panel is provided with a plurality of grooves in a front face and at least one well in a back face. This assembly may include a first elongate member having an internal lumen and a distal portion, a second elongate member, slidable within the first elongate member, and a spacer positioned between the second elongate member and the first elongate member. A lot association is built based on product flow and a parentchild record is created for lot association.