A method for synchronizing clocks in a packet transport network. A MEMS is disposed outwardly from the substrate. For as long as the payor parent does not timely pay, the system pays the payee parent the child maintenance monies and enforces rights to payment obtained from the payee parent against the payor parent under applicable statutes of the legal jurisdiction. In addition, the method has been found useful in monitoring and evaluating stored blood products and patients who will receive such a product.