For Lab $3$ use the Event Decomposition Technique to draw an appropriate Use Case diagram for the case. Create and submit a solution using LucidChart $,$Visio or Draw.io$.$

Shippers Drug Stores $($SDS$),$ which consists of a chain of retail stores across Canada, wants to be able to provide a new online customer service system. Each store has an identifying store no$,$ an address, phone and email. The company dispenses a wide range of pharmaceutical $($drug$)$ products. Each product has a name as well as a unique DIN $($Drug Identifying Number$).$ Each store keeps its own inventory record which maintains information on the quantity of each product that is on hand as well as its reorder level and reorder quantity

A major feature of the new system will enable customers to request a refill for a prescription on file with Shippers. They can do so by selecting the medication needed by entering the $7$ character RX# of their prescription. This information is on the label printed on the dispensed medication. For security purposes they will be prompted to also enter their date of birth. Basic customer data will already be on file from when the prescription was originally presented. If there are no refills left on the prescription this will be reported and the customer will be advised to contact their physician and their request will be terminated. If sufficient refills are available the prescription details will be displayed to the customer and they will be asked to confirm the refill. If they fail to confirm the refill request is terminated.

A refill request transaction will then be created with a unique request id and stored for dispensing purposes with the date and time of the refill request. The date and time for picking up the medication that the system has calculated will also be included in the transaction and also displayed back to the customer.