Below Is a Narrative of the "Determine Requirements" Portion (Bubble

Essay

Below is a narrative of the "Determine Requirements" portion (bubble 1.0) of the purchasing process described in Chapter 12.
Narrative Description
Bubble 1.1 receives and stores the requests received from the inventory-management process (inventory's purchase requisition) and various departments (purchase requisition-goods and services).
At predetermined intervals, bubble 1.2 accesses the accumulated requests held in the purchase requisition data; sorts the requests, perhaps by vendor or product type; and combines that data with the inventory master data to determine what purchases need to be made.
Required:
From the DFD (TB Figure 12.1) and the narrative description above, explode bubble 1.0 into a lower-level diagram showing the details of that process.