Examine the following case from Turner, Weickgenannt, and Copeland (2017):

Arminello, Inc. does not use a database system; rather, it maintains separate data files in each of its departments. When a sale occurs, the transaction is recorded in the sales department. Next, documentation is forwarded from the sales department to the accounting department so that the transaction can be recorded there. Finally, the customer service group is notified so that its records can be updated. (p. 499)

Describe the data redundancy and concurrency issues that are likely to arise under this scenario at Arminello, Inc. Then determine the requirements for the database system and recommend a solution to achieve the desired results. The recommendation must reflect best practices for timeliness and completeness of the information, the controls that need to be in place, and the best platform for the system.