A process management support system that supports management of a software development process requiring use of facilities, the system comprising: a storage unit storing information; and a processor unit connected to the storage unit and executing predetermined processing, wherein the storage unit stores: process information indicating the facilities used in the software development process; facility reservation information indicating reservation statuses of a plurality of the facilities; process progress history information indicating a progress history of the software development process; and facility count proposed change information indicating proposed change of a count of the facilities used in the software development process, and wherein the processor unit is configured to: calculate, based on the process progress history information, a facility usage remaining time period being a remaining time period required for a test using the facilities indicated by the process information in the software development process; specify, based on the facility reservation information, an available time range during which the facilities of the count of the proposed change indicated by the facility count proposed change information are available; forecast, based on the available time range, a progress of the software development process in the case when work for the facility usage remaining time period is changed to be carried out by the facilities of the count of the proposed change; and output information on the forecasted progress after the change. a storage unit storing information; and a processor unit connected to the storage unit and executing predetermined processing, wherein the storage unit stores: process information indicating the facilities used in the software development process; facility reservation information indicating reservation statuses of a plurality of the facilities; process progress history information indicating a progress history of the software development process; and facility count proposed change information indicating proposed change of a count of the facilities used in the software development process, and process information indicating the facilities used in the software development process; facility reservation information indicating reservation statuses of a plurality of the facilities; process progress history information indicating a progress history of the software development process; and facility count proposed change information indicating proposed change of a count of the facilities used in the software development process, and wherein the processor unit is configured to: calculate, based on the process progress history information, a facility usage remaining time period being a remaining time period required for a test using the facilities indicated by the process information in the software development process; specify, based on the facility reservation information, an available time range during which the facilities of the count of the proposed change indicated by the facility count proposed change information are available; forecast, based on the available time range, a progress of the software development process in the case when work for the facility usage remaining time period is changed to be carried out by the facilities of the count of the proposed change; and output information on the forecasted progress after the change. calculate, based on the process progress history information, a facility usage remaining time period being a remaining time period required for a test using the facilities indicated by the process information in the software development process; specify, based on the facility reservation information, an available time range during which the facilities of the count of the proposed change indicated by the facility count proposed change information are available; forecast, based on the available time range, a progress of the software development process in the case when work for the facility usage remaining time period is changed to be carried out by the facilities of the count of the proposed change; and output information on the forecasted progress after the change.