Tag Archives: failure modes

Reliability Society Denver Section Meeting on Network Reliability and Prognostics

On Friday, October 26th, the Denver Section of the IEEE Reliability Society held a technical meet at the Tivoli Building of the University of Colorado-Denver. Our newest Chair, Dr. Jason W. Rupe, presented his observations and work on the advances … Continue reading

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FMECA with Wireshark

Returning from Sharkfest, I found that my laptop’s configuration must have changed. The laptop, running Windows 7 home version, was now not able to see a few of the non-windows machines on my network, including the NAS. Assuming the cause … Continue reading

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Network availability and performability modeling tricks

I read a lot, and I mean a lot, of network reliability, availability, and performability papers. The ones we publish in the IEEE Transactions on Reliability, I read multiple times. So there are a lot of relationships that go unnoticed, … Continue reading

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Otherwise coherent networks become incoherent when capacity is concerned

See the network in Figure 1 below. Source node 1 fails, which from a pure availability perspective disrupts only traffic originating or terminating at node 1 because all other nodes can still communicate. So a coherent network (as is the … Continue reading

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Checklist for capacity management

Checklists are a very effective way to improve a manual process. When an enterprise realizes they have a resource that should be better managed, they consider capacity management, in its general form if not specifically in the context of IT. … Continue reading

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QBQ! and engineering

Engineers who solve problems (which had better be all of us!) can benefit from the concept of QBQ! create by John G. Miller (www.qbq.com). A common tool for solving engineering and business problems is root cause analysis. More specifically in … Continue reading

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