Abstract: An input/output response relation data storage 5 stores input/output response relations which are inputted by the user and in each of which an I/O station for input and an I/O station for output are defined. For input/output response relations in each of which the I/O station for input differs from the I/O station for output and each of which needs communications between the I/O stations, an interchange searcher 9 searches for an interchange candidate with which to make the I/O station for input and the I/O station for output be the same as a result of interchanging either of the I/O station for input and the I/O station for output with another I/O station, an interchanger 10 performs an interchange, and a display 3 displays a result of the interchange.

Abstract: A technique that allows determination of appropriate control parameter values automatically. A constraint evaluation indicator setting unit sets, to each of a plurality of additional constraints, a third evaluation indicator obtained by combining a first evaluation indicator that indicates a level of influence on other control parameters when a control parameter is changed, and a second evaluation indicator that indicates weight according to a property including importance and the like. A constraint satisfaction solution retrieve unit retrieves a combination of control parameter values that satisfies constraints. When the constraint satisfaction solution retrieve unit fails to retrieve the combination of control parameter values, a constraint relaxing unit relaxes the additional constraints in accordance with the third evaluation indicator.

Abstract: An input/output response relation data storage 5 stores input/output response relations which are inputted by the user and in each of which an I/O station for input and an I/O station for output are defined. For input/output response relations in each of which the I/O station for input differs from the I/O station for output and each of which needs communications between the I/O stations, an interchange searcher 9 searches for an interchange candidate with which to make the I/O station for input and the I/O station for output be the same as a result of interchanging either of the I/O station for input and the I/O station for output with another I/O station, an interchanger 10 performs an interchange, and a display 3 displays a result of the interchange.

Abstract: A technique that allows determination of appropriate control parameter values automatically. A constraint evaluation indicator setting unit sets, to each of a plurality of additional constraints, a third evaluation indicator obtained by combining a first evaluation indicator that indicates a level of influence on other control parameters when a control parameter is changed, and a second evaluation indicator that indicates weight according to a property including importance and the like. A constraint satisfaction solution retrieve unit retrieves a combination of control parameter values that satisfies constraints. When the constraint satisfaction solution retrieve unit fails to retrieve the combination of control parameter values, a constraint relaxing unit relaxes the additional constraints in accordance with the third evaluation indicator.