Fuzzy T-map estimates of complex circuit reliability

The fuzzy T — norms and T — conorms offer alternatives to compute the classical structural polynomial of a complex circuit. The reliability of a special complex 4-node circuit were evaluated, and it is show that, among a certain family of classic T — norms, the Frank T-norm provides a T — map emerging from the structural polynomial, which proves to be the best estimate for this reliability. Illustrative plots contain the 2 — parameter reliability map and the optimal fuzzy approximate — the best candidate T-map.