Stigmergy is a method of communication in decentral-ized systems in which the individual parts of the sys-tem communicate with one another by modifying their local environment. It was first observed in nature as a class of mechanisms that mediate animal-animal inter-actions and provides a new paradigm for developing decentralized complex applications such as metaheuris-tic optimization algorithms. A particularly successful metaheuristic based on stigmergy observed in colony of real ants. Ants communicate with one another by laying down pheromones along their trails, so an ant colony is a stigmergic system. Ant colony metaheuris-tic is usually used for solving (discrete) combinatorial optimization problems, but in this paper we will show a successful implementation on numerical multi-parameter optimization problem, which is often solved by algorithms for continuous optimization.