Abstract: A screen transition diagram editing apparatus includes a screen layout editor which creates and edits screen layout charts that are used in screen transition diagrams and show individual transitional screens, a screen transition diagram editor which creates and edits the screen transition diagrams each associated with the screen layout charts, and a storage section which separately stores the screen layout charts and the screen transition diagrams. The screen layout editor creates the screen layout charts in a hierarchical structure. Therefore, the screen transition diagrams can be easily created.

Abstract: An action table that describes an action for each state is generated by extracting cells that describe the action to be executed by a system from a state transition matrix. A transition table that describes a state of the transition destination for each state is generated by extracting only cells that describe actions of transition destinations from the generated matrix. An event table that describes an event that exists in each state is generated. A program code is generated by confirming existence of an event under each state by referring to the event table when an event has occurred, and by executing an action of an event that has occurred in the current state by referring to the action table and the transition table.