Tek-Tips is the largest IT community on the Internet today!
Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!
-
Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!
-
Problems in RBD modelling.
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...- Gintama
- Post #12
- Forum: Engineering methods
-
Problems in RBD modelling.
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...- Gintama
- Post #10
- Forum: Engineering methods
-
Problems in RBD modelling.
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...- Gintama
- Post #7
- Forum: Engineering methods
-
Problems in RBD modelling.
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...- Gintama
- Post #5
- Forum: Engineering methods
-
Problems in RBD modelling.
Hi, I hope this drawing will be useful. http://we.tl/Guan4Ek454 Tkshttp://we.tl/Guan4Ek454- Gintama
- Post #3
- Forum: Engineering methods
-
Problems in RBD modelling.
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...- Gintama
- Thread
- Replies: 12
- Forum: Engineering methods
-
Question about availability and reliability in complex system
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...- Gintama
- Post #3
- Forum: Engineering methods
-
Question about availability and reliability in complex system
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...- Gintama
- Thread
- Replies: 3
- Forum: Engineering methods
