For all Prosthetics orders: when ORC-1(Order Control) is "NW" (New Order), need to update OBR-18(Placer Field 1) based on PV1-2 (Patient Class) value. assumption is that the selection logic is that all prosthetics orders with OBR-18 field is always blank. Description : If PV1-2 is I, insert I in OBR-18 If PV1-2 is O, insert O in OBR-18 If PV1-2 is E, insert O in OBR-18 If PV1-2 is P, insert O in OBR-18 If PV1-2 is R, insert O in OBR-18 If PV1-2 is B, insert O in OBR-18