With "worst" case I mean the point of analysis that depends of the biggest number of devices: the middle couple depends by all the other devices A and B to reach "1" and "2". So in my drawing the point of analysis could be the green one and so the point for which i would show the results...
Hi IRstuff,
the fault of service in one area covered by two consecutive devices, does not cause fault of the services in the other places of system. For this reason I proposed to you the middle couple fault as worst case of analysis. Consider for example that A e B devices are access point of a...
I fully agree your approach. My problem is that I have a number of devices that is very bigger than the example in drawing. I don't have a specific line guide from the client, so I would ask to you if it is reasonable modelling an RBD only for the worst case. I mean: to calculate the...
No, these connection are not RBD (indeed my problem is to find the RBD model to describe this issue) but communication links (could be fiber links for example). The failure of service on each zone happens when both adjacent A and B devices are in fault or can't communicate with system "1" and...
Hi all,
I have some problems to modelling the following system by RBD scheme.
I have a sequence of N equal devices, N/2 belong to system A and N/2 belong to system B, which are installed in the following alternative order: device A, device B, device A, device B and so on. The fault happens...
Thanks IRstuff for your reply.
I prefer to use a model mathematically correct but I'm reading, for my work , some documents in which there are calculations very approximate. For example there is mtbf of a complex system calculated as an mtbf equivalent (let me say) calculated, that is...
Dear all,
This is my first topic in your (our :)) forum. The matter is how to calculate availabily (A) in complex system.
I know that for a single components A=mtbf/(mtbf+mttr).
In some articles i've readed that:
for series of two components (just a simple example) Aseries= A1*A2 and for...
