Now that the trade-offs are clear, consider the product structure depicted in Figure 3-12. Brown boxes (parts4, 5, and 7) represent outside supplier while black boxes represent internal stages within ElecComp’s suppliy chain. Observe that the assembly facility commits a 30-day response time to the customers and keeps inventory of finished goods. More precisely, the assembly facility and the facility manufacturing part 2 both produce to stock. All other stage produce to order.