¡@¡@With the rapid advance of information technology, embedded systems are becoming mature technology and have penetrated into most of the equipment. On the other hand, the unified modeling language (UML) has become a standard modeling language in object-oriented systems analysis and design. Over the past few years a considerable effort has been made in modeling the platform independent model (PIM) with UML for business information systems. However, the detailed guideline for modeling the PIM of embedded systems is lacking. ¡@¡@To alleviate the forgoing problem, this study proposed a PIM modeling methodology for embedded systems. This includes the use of sequence diagram, state machine diagram, timing diagram and class diagram for behavior and static modeling. For each diagram, the detailed modeling processes and rules are described. The research methodology is articulated using the design science research methodology. A usability evaluation is performed to demonstrate its applicability with a real-world embedded system case. With this proposed method, the system developer can easily model the PIM of embedded systems, and thereby enhance the efficiency and effectiveness of system development.

¡@¡@With the rapid advance of information technology, Service Oriented Architecture (SOA) is becoming a mature technology. Many software firms have implemented it to enhance the flexibility and efficiency of system development. Several systems analysis and design methods have been proposed to develop the SOA systems. Among them, however, the detailed guideline and procedure for identifying the services and components in PIM (Platform Independent Model) stage are lacking. ¡@¡@To alleviate the forgoing problem, this study proposed a PIM modeling methodology for developing an SOA system. The methodology which includes the business process, service, and component layers, uses the unified modeling language to describe the detailed modeling processes and rules for each layer. The research methodology is articulated using the design science research methodology. A usability evaluation is performed to demonstrate its applicability with a testing case. With this proposed method, the system developer can easily model the PIM of SOA systems, and thereby enhance the efficiency and effectiveness of system development.