*   Example 7:
echo Example 7:
*   This is an alternative implementation of the IEEE-TSE
*   Oct. 1987 paper (Example 5 on pp. 1112-1113).
*   We will now able to compute the instantaneous unavailability
*   of the system besides its steady-state unavailability

poly U(lambda, mu) gen\
   lambda / (lambda + mu), 0, 0\
  -lambda / (lambda + mu), 0, -(lambda + mu)

block  p3 (k1,u1,k2,u2,k3,u3)
comp A U(k1,u1)
comp B U(k2,u2)
comp C U(k3,u3)
parallel TOP A B C
end

block main
comp   1      U(lambda1, mu1)
comp   2-3-4  cdf(p3;lambda2,mu2,lambda3,mu3,lambda4,mu4)
comp   5      U(lambda5, mu5)
comp   6      U(lambda6, mu6)
parallel     56     5  6
series  A      1 2-3-4 56
comp   7-8-9  cdf(p3;lambda7,mu7,lambda8,mu8,lambda9,mu9)
comp   10     U(lambda10, mu10)
comp   11     U(lambda11, mu11)
series  B      7-8-9 10 11
parallel     TOP    A B
end

expr pzero (main)


