A server including an input device receiving information, an output device generating output information, a memory, and a processor utilizing the memory.The processor executes a process including receiving the information of an operations task including tasks having device and human tasks, and an order of the tasks; determining an operating time of each of the tasks based on a time determination rule; generating process definitions having the determined operating time associated with a corresponding one of the tasks; extracting, based on the process definitions and an analysis rule, one of a dependence relationship between the tasks, a risk in the dependence relationship between the tasks, and a risk in each of the tasks; and generating the output information for visually outputting one of the dependence relationship between the tasks, the risk in the dependence relationship between the tasks, and the risk in the each of the tasks.