Abstract: In a supply chain, an optimal task logic is automatically presented in accordance with a status change occurring in each enterprise in a short time. A task support system generates scenario information of a simulation and generates task logic combining information by combining the scenario information and the task logic of each enterprise. Then, KPI information for each task logic in a scenario is calculated by performing a simulation based on the task logic combining information. Next, status change information relating to a task is read, and a search for a scenario closest thereto is performed. Then, a scenario closest to the status change information is referred to, a KPI relating to the scenario from the KPI information is acquired, a scenario achieving the input importance KPI most is acquired, and a task logic that is combined with the scenario in the task logic combining information is calculated as an optimal task logic.