In this section we numerically extend the analytical insights regarding heterogeneous unreliable Tier 2 suppliers derived in the main text to a more general case in which Tier 2 suppliers may di↵er in both procurement cost and disruption risk, which we denote cj and j , j = 1, 2. As in the main text, we assume that 1 2, but the cost parameters may be ordered in any way. Our chief goal is to c...