a. What lead time (in weeks) is needed to respond to a customer order for product A, assuming no existing inventories or scheduled receipts? b. What is the customer response time if all purchased items (i.e., D, F, G, and H) are in inventory? c. If you are allowed to keep just one purchased item in stock, which one would you choose? roduct A is made from components B and C. Item B, in turn, is made from D and E. Item C also is an termediate item, made from F and H. Finally, intermediate item E is made from H and G. Note that item H has two arents. The following are item lead times:.