An implantable microphone is disclosed having an external diaphragm and housing that forming chamber capable of being pressurized by deformational movement of the diaphragm induced by pressure waves propagating through overlying tissue. The methods described herein generally require lower temperature and pressure, produce higher yields, require less time, do not use corrosive or costly reactants and solvents that are commonly used in the synthesis of the fluoro-sulfur compounds, and do not produce deleterious waste products when compared to previously-used methods. A substantially current service parts inventory plan is generated according to the status data, a service parts demand forecast, and a supply chain model, the inventory plan including target stocking levels for service parts at stocking locations.