ATIS 0100026

This Technical Report discusses design for network reliability methodology that supports the delivery of desired service availability. Design for reliability is fundamental to proactive network-reliability and resiliency planning; the TR describes a methodology for approaching this key task. To enable a more informed decision on the appropriate reliability-level for a given network-element (NE) it introduces the Significant Point of Failure (SgPoF) metric. Early computation of the SgPoF in the design process, followed by the implementation of the recommended design will result in Capital Expenditure (CapEx) savings and reduce the cost associated with design changes that occur late in the design for reliability process.