Thus far, we have considered modeling supply chain in a sequential manner as described in Figure 5.1. Having progressed from order processing through procurement and sourcing, logistics, demand management, and capacity planning, with its subcomponents of sales and operations planning (S&OP) and advanced planning and scheduling (APS), we are prepared to enter the arena of advanced supply chain management (ASCM). Each of the areas covered in the previous chapters have been necessary precursors to taking the high ground in a market or industry — by getting the internal house in order before collaborating and applying technology in an inter-enterprise network. Now the focus moves to using the advantages gained internally to team with selected allies to make similar or larger gains through a networked effort.