A system comprising: a hypervisor, being a virtual machine manager and configured to provide for the deployment of individual virtual machines (114, 116, 118); an access data collector configured to cause at least one semiconductor processor to collect access assignment data characterizing access assignment operations of the hypervisor in assigning hardware resources (106, 108, 110) among the virtual machines (114, 116, 118) for use in execution of the virtual machines; a capacity risk indicator calculator configured to cause the at least one semiconductor processor to calculate a capacity risk indicator characterizing a capacity saturation risk of the hardware resources (106, 108, 110) with respect to meeting a prospective capacity demand of the virtual machines (114, 116, 118), based on the access assignment data, wherein the capacity risk indicator calculator includes at least one pressure index calculator (130, 132, 134) configured to calculate at least one pressure index characterizing the access assignment operations of the hypervisor, with pressure being overhead activity associated with the assignment of the hardware resources, the overhead activity caused by interactions between the virtual machines (114, 116, 118); and a utilization monitor configured to collect utilization data, the utilization data representing a current utilization of the available hardware resources, the utilization data characterizing utilization levels of the hardware resources, wherein the capacity risk indicator calculator is configured to calculate the capacity risk indicator based on the utilization data and the at least one pressure index, wherein the capacity risk indicator calculator is configured to calculate the capacity risk indicator including adding the at least one pressure index as a penalty to a corresponding utilization level of the utilization levels. a hypervisor, being a virtual machine manager and configured to provide for the deployment of individual virtual machines (114, 116, 118); an access data collector configured to cause at least one semiconductor processor to collect access assignment data characterizing access assignment operations of the hypervisor in assigning hardware resources (106, 108, 110) among the virtual machines (114, 116, 118) for use in execution of the virtual machines; a capacity risk indicator calculator configured to cause the at least one semiconductor processor to calculate a capacity risk indicator characterizing a capacity saturation risk of the hardware resources (106, 108, 110) with respect to meeting a prospective capacity demand of the virtual machines (114, 116, 118), based on the access assignment data, wherein the capacity risk indicator calculator includes at least one pressure index calculator (130, 132, 134) configured to calculate at least one pressure index characterizing the access assignment operations of the hypervisor, with pressure being overhead activity associated with the assignment of the hardware resources, the overhead activity caused by interactions between the virtual machines (114, 116, 118); and a utilization monitor configured to collect utilization data, the utilization data representing a current utilization of the available hardware resources, the utilization data characterizing utilization levels of the hardware resources, wherein the capacity risk indicator calculator is configured to calculate the capacity risk indicator based on the utilization data and the at least one pressure index, wherein the capacity risk indicator calculator is configured to calculate the capacity risk indicator including adding the at least one pressure index as a penalty to a corresponding utilization level of the utilization levels.