Creation of equation

[bhargab]

Hi,
I am a new user of Weibull++7 and I need a solution to the following situation. Suppose there is an equation-

a=b+c+4d-5e-5f

Now,I want to define b,c,d,e and f as vairables with some life distribution functions and with Monte Carlo simulation, I would like to find the probability of failure of "a" against some particular value.

Kindly anyone let me know how to simulate this kind of situation in Weibull++7.

Thanks

[Arai.M]

In weibull you would define folios with the distributions for b, c, d, e and f. Note that when there is no data in a folio and you click calculate, it allows you to enter parameters for the distribution you choose. Then from the Monte Carlo simulation tool in Weibull (under Tools, Generate Monte Carlo Data...) you can chose a User Defined distribution. You can then define the equation described below and generate N random numbers for "a". Then fit a distribution to those values and finally find the probability that a is less than the value of interest.

Alternatively you can use RENO (see attached file) defining b, c, d, e and f as random variables and a as the equation described below. Then comparing multiple generated a values to the value of interest (for a demo see http://www.reliasoft.com/reno/evaluation.htm)

Hope this helps,
Arai