1. A management method performed by a first platform of a first process in a system in which each of platforms is formed in a different process, and the first platform is managing software modules that are installed into the first platform, comprising the steps of: reading out an attribute of a software module included in the software modules installed into the first platform, from the software module; referring to the attribute of the software module read out in the reading step, upon activating the software module that provides another software module with a service, wherein the first platform is executed by a first virtual machine; forming a second platform of a second process for activating the software module that has not been activated and activating the software module on the second platform of the second process, in a case where the attribute referred in the referring step includes a different process formation attribute indicating that the software module is to be executed on a platform of a process different from the first process of the first platform in which the software module is installed, wherein the second platform is executed by a second virtual machine different from the first virtual machine; and activating the software module on the first platform in a case where the attribute referred in the referring step does not include the different process formation attribute.