In this article, we review the research state of the bullwhip effect in supply chains with
stochastic lead times. We analyze problems arising in a supply chain when lead times are
not deterministic. Using real data from a supply chain, we confirm that lead times are
stochastic and can be modeled by a sequence of independent identically distributed random
variables. This underlines the need to further study supply chains with stochastic lead times
and model the behavior of such chains.