Method embodiments to implant a stimulation lead in a patient’s sacrum to deliver neurostimulation therapy can reduce patient surgical complications, reduce patient recovery time, and reduce healthcare costs. A phase relationship between the signals to the first comparator is 180 degrees shifted relative to a phase relationship between the signals to the second comparator. The device identifies a first link from the links. The second flexible printed circuit board electrically connects the display module and the first flexible printed circuit board, wherein the first and second flexible printed circuit boards are joined by hot bar soldering or anisotropic conductive film bonding. The first part is made of a waterproof stretchable material at least in the upper. In the scheduling of a particular job on a particular machine, characteristics relating to the particular job and characteristics relating to the particular machine can be taken into consideration by the scheduling system.