1. A method for activating virtual machines in a virtual solution, comprising: activating activation items in a first activation item set independently of other virtual machines for each virtual machine; activating activation items in a second activation item set in coordination with activation of activation items of at least another virtual machine for at least one virtual machine; and generating the first activation item set for each virtual machine by analyzing dependency relationships between activation items describing various virtual machines in the virtual solution; wherein activating activation items in the second activation item set for each virtual machine in the at least one virtual machine comprises activating, one by one, based on the dependency relationships, activation items in the second activation item set that are directly dependent on the activation items in the first activation item set, and activating, one by one, activation items in the second activation item set that are indirectly dependent on activation items in the first activation item set, until all activation items in the second activation item set have been activated.