... The data services layer provides the standard create, retrieve, update, and delete data services, as well as data calculations, summations, and validation. d. What boundaries did you use ... a solution that meets these needs according to type: user, business, or data. ! Identify user, business, and data services 1. Read the activity s scenario. The services needed to provide the ... Activity 2 .1: Identifying Services In this activity, you will identify service classes for the Ferguson and Bardell, Inc. case study. After these service classes have been identified and...