Subsystem 1: Process customers email orders

When an employee or the owner of LAutre Choix Mini Marche receives an order from a customer by email, s/he verifies the availability of the ordered products by viewing the products in the store. As s/he locates an ordered product in the store, s/he writes it on the paper listing the products in this order. When completed, this paper is stored with all other verified orders in a pile on the owners desk until an employee has time to assemble the order. If, on the other hand, an ordered product is not available in the store, it is first recorded in a spreadsheet with all other unavailable products. S/he then immediately offers the customer an alternative product by viewing the products in the store. If the customer does not accept it, the employee continues to offer other alternatives until the customer either accepts it or decides not to order that product. When the customer accepts the offered alternative product, it is immediately added to the list of products in this verified order.

Once an employee has time, s/he assembles the verified orders by placing the listed products in a bag. As soon as s/he completes assembling the order, s/he places the bag in another location with all other assembled orders and attaches the list of products in the verified order to the bag. S/he immediately contacts the customer, informing him/her that the order is ready for pick-up.

If the customer had requested delivery, s/he would have stated it when placing the order, which would then have been included in the verified order. At the time of delivery, an employee generates a delivery list based on the verified order list attached to the assembled order and delivers both the ordered products and this new list of deliveries to the customer. The original verified order list is stored with all other completed deliveries.

REQUIREMENTS:

1. Develop a logical process model corresponding to the narrative below including context level, level-1 DFD.

2. Identify pieces of missing information in a separate list. Consider missing logic, miracles, black holes, and grey holes. Limit listing infinite sinks and sources, read-only and write-only data stores to a maximum of 1.