An embedded control system capable of ensuring precision in arithmetic with data in the floating-point format and also avoiding a shortage of the storage area of a memory is provided. The oil pan according to the present invention contains a film which covers an oil surface of the oil to separate the stored oil and the gas above the oil. Once the billing information has been retrieved for the identified caller, the payment of a bill can be processed based upon the billing information. The process automation component presents a GUI to generate a work flow definition in a high level business process execution language, with interaction with the service enabler resources which implement the process.