“…Several authors have addressed the economic optimization of reliability in power distribution networks and telecoms networks, mainly concentrating on architecture: [2]- [3], [9]- [12], [14], [25], [26], [29]. A few authors have considered design guided by cost of interruption, or value to customers: [8], [13], [19], [23]. Also several have considered the allocation of reliability parameters to subsystems and components, see: [7], [16], [17], [21], [22], [27], [30].…”