In the next set of steps, we define the triggers for the transitions between the states. First, we set up the transition that occurs when we are told the order has been shipped.

For smaller clusters, there is no clear characteristic of first-order phase transition during the melting, implying a coexistence of solid and liquid phases due to finite-size effect.

Near the transition temperature, a thermal hysteresis was found in dielectric, pyroelectric and piezoelectric measurements. Thus the transition should be of the first order transition.