JP2001325020A - State transition chart display system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prepare a state transition chart for easy understanding state transition in an upper rank hierarchy and for easy understanding state transition across state hierarchies. SOLUTION: A state selection situation, indicating an object to be displayed among states, is held in a state selection holding part 11. Also, an event selection situation, indicating an object to be displayed among events, is held in an event selection holding part 12. A display preparing part 13 prepares a state transition chart based on the state selection situation and the event selection situation and displays it at a display device 2. Information, indicating that the state is developed to a lower rank hierarchy, is stored in a state hierarchy data base 14, and the display preparing device 13 adds display indicating inter- state hierarchical relation to the state transition chart. Thus, the hierarchized state transition model can be expressed, and the state to be expressed in the state transition chart can be selected by a user, as necessary. Thus, the state transition in the upper rank hierarchy or the state transition across the state hierarchies is understood more easily.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a state transition model in which states transition in response to occurrence of an event.
The present invention relates to a system for displaying a state transition table that represents a hierarchical state transition model having hierarchical states.

[0002]

2. Description of the Related Art Conventionally, in a state transition table used to represent a state transition model in which a state transits in response to occurrence of an event, only the correspondence between each state and each event is represented. Therefore, the hierarchical relationship between the states has not been reflected in the display operation. Therefore, in order to express a state transition model having a hierarchical state, one state transition table having all the states including the lower layers is expressed, or one state transition table is created for each state hierarchy. It was expressed by doing.

Further, in the hierarchical state transition model, there may exist an event that is valid only in a limited state hierarchy, but in the conventional state transition table, each event is valid for each state. Or not.

[0004]

In the conventional state transition table, when the entire hierarchical state transition model is represented by one table, all states expanded to all lower layers and all events are displayed in a table. Was included. for that reason,
There is a problem that the table becomes too large and it is difficult to grasp the whole, and it is particularly difficult to grasp the state transition in the upper hierarchy.

In the method of expressing each state using a separate state transition table for each layer, the state transition completed in one layer can be easily grasped. Since there is a transition between a plurality of state transition tables, there is a problem that it is difficult to grasp the state transition.

The present invention has been made in view of such a conventional problem, and selectively includes a state of a lower hierarchy and an event related to its transition in a state transition table, thereby enabling a state of an upper hierarchy. It is an object of the present invention to make it easy to grasp transitions and to understand state transitions between state hierarchies.

[0007]

A state transition table display system according to the present invention corresponds to a plurality of state names indicating a plurality of states, a plurality of event names indicating a plurality of events, and one state. In a state transition table display system that displays a state transition table including a plurality of state transition information related to other states transitioned by an event on a display device, a plurality of state names, a plurality of event names, a plurality of state transition information, A state selection database that stores a state selection status indicating whether each of the plurality of state names is a display target or a non-display target in association with the state name; and the state transition database. , A plurality of state names, a plurality of event names, and a plurality of state transition information are read from the plurality of state names. Select the state name indicating that the selected state is to be displayed, select the selected state name, the event name corresponding to the selected state name, and the state transition corresponding to the selected state name A display creation unit that creates a state transition table including information and displays the created state transition table on a display device.

[0008] The state transition table display system further comprises:
An event selection holding unit that stores an event selection status indicating whether each of the plurality of event names is a display target or a non-display target in association with the event name; and the display creation unit includes the event selection holding unit Select the event name indicating that the event selection status stored in is displayed, and among the event names corresponding to the selected state name, display the state transition table with the selected event name as the display target. It is characterized in that it is created.

The display creation unit searches the state transition database for an event name corresponding to the state name indicating that the state selection state is to be displayed, and displays the event selection state of the searched event name. It is characterized in that it is set to an event selection status indicating that it is a target.

[0010] The state transition table display system further comprises:
An input section for inputting a state name to be displayed is provided, and the display creating section sets a state selection state corresponding to the state name input by the input section to a state selection state indicating that the state is to be displayed. Features.

The state transition table display system further includes:
A state hierarchy database that stores another state transited by an event corresponding to the one state as a lower hierarchy state in association with the one state, wherein the display creating unit includes a state indicated by a state name to be displayed; When the state name to be displayed has a state of a lower layer, the state name to be displayed has a state of a lower layer. Is displayed on a display device.

The state transition table display system further includes:
Among the state names displayed in the state transition table displayed on the display device, an input unit is provided for inputting a state name selected by the user, and the display creation unit indicates the state name input by the input unit. The state of the lower layer included in the state is set as a new display target, a state transition table for displaying the state of the lower layer is created, and the created state transition table is displayed on a display device.

In the state hierarchy database, the second state transitioned by an event corresponding to the first state is defined as a state of a first lower layer, and further, a third state transitioned by the transitioned second state. As the state of the second lower hierarchy,
The states of a plurality of lower layers constituting a hierarchy of a plurality of state transitions in which states sequentially transition are stored in association with the first state,
The display creation unit displays a plurality of lower hierarchical levels of the state indicated by the input state name.

The input section inputs a state name selected by the user among the state names displayed in the state transition table displayed on the display device, and the display creation section inputs the state name input by the input section. A state transition table for displaying a state name is created.

The input unit inputs state transition information selected by the user from among the state transition information displayed in the state transition table displayed on the display device, and the display creating unit inputs the state transition information by the input unit. And a state transition table that displays a state name specified by the specified state transition information.

Further, the input unit is characterized in that by selecting a state column displayed on a state transition table displayed on a display device, the selected state name is obtained.

The state transition table display system according to the present invention includes a plurality of state names indicating a plurality of states, a plurality of event names indicating each of a plurality of events, and other state transitions caused by an event corresponding to one state. In a state transition table display system for displaying a state transition table including a plurality of state transition information related to states on a display device, a state transition database storing a plurality of state names, a plurality of event names, and a plurality of state transition information And an event selection holding unit that stores an event selection status indicating whether each of the plurality of event names is a display target or a non-display target in association with the event name, and a plurality of state names from the state transition database. , A plurality of event names and a plurality of state transition information, and, based on the plurality of read event names, the event selection holding unit An event name indicating that the stored event selection status is to be displayed is selected, and the selected event name, the state name corresponding to the selected event name, and the event name corresponding to the selected event name are selected. A display creation unit that creates a state transition table including the state transition information and displays the created state transition table on a display device.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a configuration of a state transition table display system according to an embodiment of the present invention. In FIG. 1, one embodiment of the present invention comprises an input unit (input device) 1 such as a mouse or a keyboard for performing an input operation, a display device 2 such as a CRT display device, and a state transition table. Control unit 3 for displaying
Consists of

The control unit 3 displays a state selection holding unit 11 for holding a selection state of a state to be included in the state transition table, and an event selection and holding unit 12 for holding a selection state of an event to be included in the state transition table. Creation unit 13 that composes a state transition table based on the states and events selected for
, A state hierarchy database 14 that holds a hierarchical relationship between states, and a state transition database 1 that holds state transition information corresponding to a combination of each state and each event.
5 is comprised.

The input unit 1 has an input device such as a mouse or a keyboard, and allows a user to give an operation instruction such as selection of a state and display / non-display of a state to the system of the present invention.

The state selection holding unit 11 holds a state selection state of whether each state is included in the state transition table. The selection status is updated by the display creation unit 13 when the user changes the selection of the status or the display / non-display through the input unit 1.

The event selection holding unit 12 holds an event selection status indicating whether each event is to be included in the state transition table. The selection state of the event is updated by the display creation unit 13 when the user changes the state selection or display / non-display through the input unit 1.

When an instruction for a state to be included in the state transition table to be displayed is given from the input unit 1, the display creating unit 13 changes the state of the state transition table based on the contents of the state selection holding unit 11 and the state hierarchy database 14. Is determined, and the content of the determination is held in the state selection holding unit 11.
Then, an event to be included in the state transition table is determined based on the contents of the event selection holding unit 12 and the state transition database 15, and the determined contents are held in the event selection holding unit. Further, the state selection holding unit 11 and the event selection holding unit 1
2, a state transition table based on the contents of the state hierarchy database 14 and the state transition database 15, and the display device 2
Output the state transition table.

The state hierarchy database 14 is a database that holds the hierarchical relation between the states, and can express the hierarchical relation in a tree structure as shown in the example of FIG. In the example of FIG. 2, the upper part of the figure represents the upper part of the hierarchy, and the lower part of the figure represents the lower part of the hierarchy. The highest status is "normal" and "abnormal". "Stop" and "operation" are one level lower than "normal", and "low speed" and "high speed" are one level lower than "operation".

The state transition database 15 holds state transition information corresponding to each combination of each state and each event. The state transition information has information on whether an event is valid for the state. Further, when the event is valid, the information at the time of occurrence of the event, the transition condition, and the state of the transition destination are stored as information.

FIGS. 3, 4, and 5 show display examples of the state transition table. FIG. 4 is a display example of a state transition table in which the state one level lower than the state transition table of FIG. 3 is expanded and displayed. FIG.
Is a display example of a state transition table in which states of all layers are expanded and displayed from the state transition table of FIG. In these display examples, the horizontal axis is the status name column and the vertical axis is the event name column. However, the display contents are equivalent even if the vertical axis and the horizontal axis are exchanged, and such a display format is also used. Of course it is possible. The state transition tables of FIGS. 3 to 5 are created from four data of the state selection holding unit 11, the event selection holding unit 12, the state hierarchy database 14, and the state transition database 15.

First, the columns of the vertical axis and the horizontal axis of the table are determined. The state that has been selected by referring to the state selection holding unit 11 and the event that has been selected by referring to the event selection holding unit 12 are found. This is the column (state) on the horizontal axis and the column (event) on the vertical axis of the state transition table.

Next, a state transition information column of the state transition table is created. State transition information (transition destination, transition condition, operation) corresponding to each combination of the already selected state and event is found in the state transition database 15 and added to the state transition table. Also, the horizontal axis column (state) in the state transition table
Displays the presence / absence of a lower state for. With reference to the state hierarchy database 14, it is determined whether or not each state in the table has a lower-level state, and if there is a lower-level state, its mark is displayed (in FIG. 3 to FIG. 5, "▽" is used). Represents).

Display Examples of State Transition Tables In FIGS. 3 to 5, "reset" and "error occurrence" are valid events for all states, and "start" and "stop" are states of "normal". The event is valid only for the lower state, and “acceleration” and “deceleration” are events valid only for the lower state of the state “operating”.

The contents of the transition information column of the state transition table are as follows:
If the event is not valid for the state, it is shaded. Although not particularly specified in these display examples, when the event is valid, the operation at the time of occurrence of the event, the transition condition, and the state of the transition destination can be held as information.

Next, the processing procedure in the display creation unit 13 will be described. FIG. 6 is a flowchart showing the processing of the display creation unit 13.

As an example, when the state transition table as shown in FIG. 3 is displayed, the user designates the state “normal”, and
The processing when an instruction to display this state and its lower-level states will be described.

The state transition table shown in FIG. 3 is created and displayed by the display creating unit 13 in the following procedure based on the state selection holding unit 11 shown in FIG. 7 and the event selection holding unit 12 shown in FIG. It is a thing. The state transition selected by the state selection holding unit 11 shown in FIG. 7 is “normal”.
It is "abnormal". The events that have been selected by the event selection holding unit 12 shown in FIG. 8 are “reset” and “error occurred”. The state transition table shown in FIG. 3 is created using these states, events, the state transition database 15, and the state hierarchy database 14.

In the following description, the case where only one layer is designated as the lower layer (the state transition table shown in FIG. 4) and the case where all the layers are designated (the state transition table shown in FIG. 5) are shown together. I have. In order to specify a specific state by the user in the state transition table of FIG. 3, a method of selecting a state from the state name column (horizontal axis of FIG. 3) and a transition destination state are described in the transition information column. In this case, the transition destination state can be selected, but the operation is the same in either case.

In the following description, the state hierarchy database 14 shown in FIG. 9 and the state transition database 15 shown in FIG.

In step 101, the state selection holding unit 11 is updated according to the state and operation specified by the user. That is, if the specified state is to be displayed, the state selection holding unit 11 is updated with the state selected. Instead, if you want to hide the specified state,
The state selection holding unit 11 is updated with the state being unselected. In the example of FIG. 3, since the state “normal” is selected and the display is specified, the state selection holding unit 11 is updated as the state “normal” has been selected.

In step 102, the designated state 1
Processing is divided depending on whether or not the user has specified that a state lower in the hierarchy is to be processed. When it is specified that the state one level lower is to be processed (step 102)
If Yes), the process branches to step 103; otherwise (No in step 102), the process branches to step 104. The case of No in step 102 is a case of creating a state transition table of the highest layer (corresponding to the state transition table of FIG. 3) or a case of creating state transition tables of all layers.

In step 103, based on the state hierarchy database 14 (FIG. 9), one of the states designated by the user
All the states lower in the hierarchy are searched, and the state selection holding unit 11 is updated for the searched states. That is, if the searched states are to be displayed, those states are selected and the state selection holding unit 11 is updated.

Otherwise, if the searched states are to be hidden, those states are not selected and the state selection holding unit 11 is updated. "Normal" from the state transition table of FIG.
In the example of selecting the state and displaying the state transition table including the lower one layer, the states “stopped” and “operating” located one layer lower than the state “normal” are already selected, and the state selection holding unit 11 Is updated. FIG. 11 shows the updated state selection holding unit 11.

In step 104, the processing is divided depending on whether or not the user has specified that the state in all the layers below the specified state is to be processed. If it is specified that states in all lower layers are to be processed (Yes in step 104), the process branches to step 105; otherwise (No in step 104, that is, the highest state transition table ( 3) branches to step 106.

In step 105, based on the state hierarchy database 14 (FIG. 9), all states in all lower layers of the state designated by the user are searched, and the state selection holding unit 11 is searched for the searched state. Update. That is, if the searched states are to be displayed, those states are selected and the state selection holding unit 11 is updated.
Otherwise, if the searched states are to be hidden, those states are unselected and the state selection holding unit 11 is updated.

In the example in which the state “normal” is selected from the state transition table of FIG. 3 and the state transition table including all lower layers is displayed, the state “position” located in all lower layers of the state “normal” is displayed. The state selection holding unit 11 is updated assuming that "stopped", "operating", "low speed", and "high speed" have been selected. FIG.
The updated state selection holding unit 11 is shown.

In step 106, based on the contents of the state transition database 15 (FIG. 10), the state selection holding unit 11
For each state selected as a display target in,
All the valid events are selected, and the event selection holding unit 12 is updated. Specifically, the content of the operation of “selecting a valid event” in S106 is as follows. If a state S (or a plurality of states) is found for a certain event in the state transition database, it is interpreted that the event is valid for the following states. (A) state S (b) all states in the lower hierarchy of state S (c) all states in the same hierarchy as state S, and all states in the lower hierarchy of those states

For example, the state transition database 1 shown in FIG.
In the example of No. 5, a state of “abnormal” is found for the event of “reset”. Next, by referring to the state hierarchy database 14 (FIG. 9), this event "reset" is (a) "abnormal" and (c) "normal".
It is valid for each state of "stopping", "running", "low speed", and "high speed". To check the status at the same or lower level, refer to the status hierarchy database.

Similarly, for example, for the event of "stop", a state of "operating" is found. From here, this event will be (a) "driving", (b)
This can be said to be effective for each state of "low speed", "high speed", and (c) "stopping". In S106, such event selection is performed for all states that have been selected by the state selection holding unit.

In the example of FIG. 3, when only the lower one layer is displayed, the states “normal”, “abnormal”, “stopped”, “operating” (the state selection holding unit 11 shown in FIG. 11) are effectively enabled. The event selection holding unit 12 is updated with the event “reset”, “error occurrence”, “start”, and “stop” already selected. FIG. 12 shows the updated event selection holding unit 12.

In the example of FIG. 3, when displaying all lower layers, the states "normal", "abnormal", "stopping", "operating", "low speed", and "high speed" (the state selection shown in FIG. 13). The event selection / holding unit 12 is updated with the events “reset”, “error occurrence”, “start”, “stop”, “acceleration”, and “deceleration” that have become valid for the holding unit 11) already selected. FIG.
Indicates the updated event selection holding unit 12.

In step 107, the state selection holding unit 11
Then, a state transition table composed only of all the states selected by and the events selected by the event selection holding unit 12 is created. The contents of the transition information column of the state transition table are acquired from the state transition database 15. However, if the event is not valid for the state, a display indicating invalidity is displayed in the transition information column, and no other information is displayed in that column.

When only one lower hierarchy is displayed in the example of FIG. 3, a state transition table as shown in FIG. 4 is created. The state transition table of FIG. 4 is generated based on the state selection holding unit 11 shown in FIG. 11 and the event selection holding unit 12 shown in FIG.

When all the lower layers are displayed in the example of FIG. 3, a state transition table as shown in FIG. 5 is created. The state transition table of FIG. 5 is generated based on the state selection holding unit 11 shown in FIG. 13 and the event selection holding unit 12 shown in FIG. In the examples of FIGS. 4 and 5, the columns shaded with diagonal lines indicate that they are invalid.

In step 108, based on the state hierarchy database 14, whether or not all the states in the state name column have lower-level states is displayed in the state name column. In the examples of FIGS. 4 and 5, a “▽” mark is displayed in the state “normal” or “during operation” having the lower hierarchy.

As described above, this state transition table display system includes a state name array on one axis and an event name array on the other axis. A state transition table display system including a transition information column indicating whether an event is valid, an operation when the event occurs, a transition condition, and a state of a transition destination. When one or a plurality of states are selected and one or a plurality of events are selected from all the events, a state transition table including the selected states and the events is constructed and displayed. .

Embodiment 2 In the first embodiment, the state transition table is created by using the state selected by the state selection holding unit 11 and the event selected by the event selection holding unit 12. However, one of the state selection holding unit 11 and the event selection holding unit 12 may be used.
A state transition table may be created using the state selected by the state selection holding unit 11, the state transition database 15, and the state hierarchy database 14. Alternatively, a state transition table may be created using the events that have been selected by the event selection holding unit 12, the state transition database 15, and the state hierarchy database 14.

[0054]

According to this state transition table display system,
A state transition table indicating the state selected by the user can be displayed.

According to the state transition table display system, in addition to the state selected by the user, a state transition table indicating the event selected by the user can be displayed.

According to the state transition table display system, it is possible to select an event corresponding to the state selected by the user and display the state transition table.

According to the state transition table display system, the state selected by the user can be input from the input unit, and the input state can be set as a display target.

According to this state transition table display system, it can be displayed that the displayed state has a state of a lower hierarchical level.

According to this state transition table display system, when the displayed state has the state of the lower hierarchy, the user selects the state and develops the state into the state transition table for displaying the state of the lower hierarchy. Can be.

According to this state transition table display system, when the displayed state has a plurality of lower hierarchical levels,
When the user selects a state, the state can be expanded to a state transition table displaying a plurality of lower-layer states.

According to the state transition table display system, the state selected by the user can be displayed on the state transition table by selecting the state from the input unit.

According to this state transition table display system, the state corresponding to the selected state transition information can be displayed on the state transition table by selecting the state transition information selected by the user from the input unit.

According to the state transition table display system, the user can easily select a state.

According to this state transition table display system, a state transition table indicating the event selected by the user can be displayed.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a state transition table display system according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating an example of a hierarchical relationship in a state according to an embodiment of the present invention.

FIG. 3 is a diagram showing an example of a display format of a state transition table when a state of a lower hierarchy according to the embodiment of the present invention is hidden.

FIG. 4 is a diagram showing an example of a display format of a state transition table when displaying up to one level lower in the state of the present invention.

FIG. 5 is a diagram showing an example of a display format of a state transition table when displaying states of all layers according to the embodiment of the present invention.

FIG. 6 is a flowchart illustrating an operation procedure of the display creation unit according to the embodiment of the present invention.

FIG. 7 is a diagram showing a state selection holding unit corresponding to the state transition table shown as an example in FIG. 3;

8 is a diagram showing an event selection holding unit corresponding to the state transition table shown as an example in FIG. 3;

FIG. 9 is a diagram illustrating an example of a state hierarchy database according to the embodiment.

FIG. 10 is a diagram illustrating an example of a state transition database according to the embodiment.

FIG. 11 is a diagram showing a state selection holding unit corresponding to the state transition table shown as an example in FIG. 4;

FIG. 12 is a diagram illustrating an event selection holding unit corresponding to the state transition table illustrated as an example in FIG. 4;

FIG. 13 is a diagram illustrating a state selection holding unit corresponding to the state transition table illustrated as an example in FIG. 5;

FIG. 14 is a diagram illustrating an event selection holding unit corresponding to the state transition table illustrated as an example in FIG. 5;

[Explanation of symbols]

1 input unit, 2 display device, 3 control unit, 11 state selection holding unit, 12 event selection holding unit, 13 display creation unit, 14 state hierarchy database, 15 state transition database.

Claims (11)

[Claims] 1. A plurality of state names indicating each of a plurality of states, a plurality of event names indicating each of a plurality of events, and a plurality of state transition information relating to another state transited by an event corresponding to one state. A state transition table display system for displaying a state transition table including a plurality of state names, a plurality of event names, and a plurality of state transition information; A state selection holding unit that stores a state selection state indicating whether the state is a display target or a non-display target in association with a state name; a plurality of state names from the state transition database; a plurality of event names; The state transition information is read, and a state name indicating that the state selection status stored in the state selection holding unit is a display target from the plurality of read state names. And creates a state transition table including the selected state name, an event name corresponding to the selected state name, and state transition information corresponding to the selected state name, and creates the created state transition. A state transition table display system, comprising: a display creation unit that displays a table on a display device. 2. The state transition table display system further stores an event selection status indicating whether each of the plurality of event names is a display target or a non-display target in association with the event name. The display creation unit, selects an event name indicating that the event selection status stored in the event selection holding unit is to be displayed, and displays an event name corresponding to the selected state name. 2. The state transition table display system according to claim 1, wherein the state transition table is created with the selected event name as a display target. 3. The display creation section searches the state transition database for an event name corresponding to a state name indicating that the state selection state is a display target, and selects an event selection state of the searched event name. 2. The state transition table display system according to claim 1, wherein the status transition table is set to an event selection status indicating that the event is to be displayed. 4. The state transition table display system further includes an input unit for inputting a state name to be displayed, and the display creation unit displays a state selection status corresponding to the state name input by the input unit. The state transition table display system according to any one of claims 1 to 3, wherein the state is set to a state selection state indicating a display target. 5. The state transition table display system further includes a state hierarchy database that stores another state transited by an event corresponding to the one state as a lower layer state in association with the one state, The display creation unit searches the state hierarchy database according to the state indicated by the state name to be displayed, and as a result of the search, if the state name to be displayed has a state of a lower layer, 2. The state transition table display system according to claim 1, wherein the display device displays on the display device that the state name is a state of a lower hierarchical level. 6. The state transition table display system further includes an input unit for inputting a state name selected by a user among state names displayed in a state transition table displayed on a display device, The display creation unit creates a state transition table that displays the state of the lower hierarchy, with the state of the lower hierarchy of the state indicated by the state name input by the input unit as a new display target, and creates the state transition table that is created. The state transition table display system according to claim 5, wherein is displayed on a display device. 7. The state hierarchy database sets a second state transited by an event corresponding to the first state to a state of a first lower layer, and furthermore, a third state transitioned by the transited second state. As the state of the second lower layer, the state of a plurality of lower layers constituting a plurality of state transition layers in which the state sequentially transitions is stored in association with the first state, and the display creation unit, 7. The state transition table display system according to claim 6, wherein a plurality of lower layer states of the state indicated by the input state name are displayed. 8. The input unit inputs a state name selected by a user among state names displayed in a state transition table displayed on a display device, and the display creation unit inputs the state name by an input unit. The state transition table display system according to claim 4, wherein a state transition table that displays the performed state names is created. 9. The input unit inputs state transition information selected by a user from among state transition information displayed in a state transition table displayed on a display device, and the display creating unit includes: 8. The state transition table display system according to claim 4, wherein a state transition table that displays a state name specified by the state transition information input by the user is created. 10. The method according to claim 1, wherein the input unit is configured to obtain a selected state name by selecting a state column displayed in a state transition table displayed on a display device. Item 4. The state transition table display system according to Item 4. 11. A plurality of state names indicating each of a plurality of states, a plurality of event names indicating each of a plurality of events, and a plurality of state transition information relating to another state transited by an event corresponding to one state. A state transition table display system for displaying a state transition table including a plurality of state names, a plurality of event names, and a plurality of state transition information; An event selection holding unit that stores an event selection status indicating whether it is a display target or a non-display target in association with an event name; a plurality of state names from the state transition database; a plurality of event names; The state transition information is read, and the event selection status stored in the event selection holding unit is displayed based on the plurality of read event names. An event name indicating that the event is an elephant is selected, and a state transition including the selected event name, a state name corresponding to the selected event name, and state transition information corresponding to the selected event name is performed. A display creation unit for creating a table and displaying the created state transition table on a display device.