Capturing and Linking Use Cases to Rich Pictures

1. Capturing and Linking Use Cases and Concerns to Rich Pictures: Catalyst.gsm.uci.edu Walt Scacchi, Ph.D. Systems Analysis and Design for ECommerce and EBusiness GSM 271/FEMBA 271 Spring 2003

2. Use Case Review A Use Case tells a story of reaching a goal, or a set of stories about reaching or failing.

3. Use Case Review • A UC story captures: • a relation (activity designated by a verb/verb phrase) • the role/community/actor who performs the activity • normal, exceptional and error scenarios • Scenarios are narratives that describes a sequence of steps, actions or other activities • Scenarios identify objects that the actor manipulates through the relation • Objects have attributes which may be manipulated by steps in the relation

4. A Use Case Example • UC 4: “Place an order” • (Normal Scenario): • “ 1. The clerk identifies the customer, each item and quantity. • 2. System accepts and queues the order.” • (Exception Scenarios): • “1a. Low credit: Clerk takes prepayment” • “2a. Low on stock: Customer accepts reduced...”

5. Use Case Example in detail • “Place an order” -- the relation as a verb phrase • “Clerk”, “Customer” and “System” are the actors • “Order” (as in purchase_order) is an object manipulated by the clerk and system • Order has attributes: “customer-identifier”, “item”, “quantity”, “credit-status”, etc.

6. Format for Capturing a Use Case • UC Identifier (a verb phrase identifying the relation) • Scenarios • (Optional--extra credit) Use Case Diagram • Items specific to the relation extracted from the Rich Picture • UML has a modeling/diagramming construct called a “Use Case Diagram”, which is a more primitive subset of a Rich Picture. • Search for details Use Case Diagram on the Web

7. Use Case Examples for a Corporate Portal: Catalyst.gsm.uci.edu

8. Fund, delegate, & promote Provide high-quality course content Communicate, discuss, teach, & research Enterprise Mandala Communicate & support faculty & students UCI GSM Dean’s Office Faculty Create/edit & upload content GSM staff Download content Edit/upload content Do Email CentralizeISsupport and content mgmt. Do Forum or Chat/IRC Access other Web content Communicate, discuss, & learn Upload messages or bio content Develop& Test Catalyst Help faculty, students, staff with h/w, s/w & network Download content Manage Catalyst content MBA students GSM IT Support Staff An enterprise system rich picture for the UCI GSM Catalyst System with hyperlinked descriptions of the Use Cases and Concerns

9. Create/edit & upload content Download content note: there are two instances of this relation in the rich picture Edit/upload content Upload messages/bio. content Do Forum or Chat Do Email Access other Web content Manage Catalyst content Develop & Test Catalyst Relations in Catalyst

10. Do Forum or Chat • Faculty can request students in their courses to download or upload messages via a Discussion Forum or Chat • Faculty or Students can download/upload messages for sharing with other students in their course at any time. • (Exception) Faculty can remove messages from their Discussion Forums • User constraint: Messages that are deleted from a Discussion Forum cannot be retrieved • User constraint: Chat message content is not saved by Catalyst • System constraint: Discussion Forum message content may be lost if Catalyst Database is not backed-up.

11. Create/edit & upload content • Faculty (authors) create (insert) new content or edit (update) existing course content • Faculty can transmit the content they create to Administrative staff for edit&upload into Catalyst, else Faculty upload their content into Catalyst • Faculty/staff can only upload one type of course content at a time into Catalyst • (Exception) Catalyst will allow existing content to be copied from one course to another without upload. • Faculty can only edit (update) content they have individually created • (Exception) Faculty may copy and paste content created by other Faculty from one part of Catalyst (“Faculty Lounge”) into their course content. • User constraint: Catalyst cannot verify if content uploaded is correct in any sense. User is responsible for correctness of content • System constraint: Catalyst will not allow content edit/upload if the Catalyst DBMS is not available

12. Download content • Users (Faculty and Students) can search and download course content: • for courses Faculty have created; or • for messages or biography info. entered by Students in a course; or • (Exception) from course content designated for sharing by all Faculty (course syllabi and linked materials) • User constraint: Catalyst will not allow access to content except as allowed by GSM Dean’s policy • System constraint: Catalyst will not allow search or download of Catalyst content if Catalyst DBMS is unavailable.

13. Edit/upload content • Faculty can transmit the content they create to Administrative staff (publishers) for edit&upload into Catalyst • Administrative staff can only upload one type of course content at a time into Catalyst • (Exception) Catalyst will allow existing content to be copied from one course to another without upload. • User constraint: Catalyst cannot verify if content uploaded is correct in any sense. User is responsible for correctness of content • System constraint: Catalyst will not allow content edit/upload if the Catalyst DBMS is not available

14. Upload messages/bio. content • Students can download, update, then upload personal biography information for sharing with other users. • Students (end-users) can upload messages for sharing with other students in their course at any time. • (Exception): Students can send&receive email from other students via Catalyst, without uploading these messages into Catalyst • User constraint: Catalyst cannot verify if content uploaded is correct in any sense. User is responsible for correctness of content • System constraint: Catalyst will not allow content edit/upload if the Catalyst DBMS is not available

15. Do Email • Any user can access internal or external email systems via Catalyst to create, upload, download, update then upload messages for other users at any time. • Catalyst does not manage email messages or message services • (Exception): Users can create, upload, download, update then upload email messages via Catalyst, without uploading these messages into Catalyst. • User constraint: Users cannot use Catalyst to manage or keep track of personal/private email messages or message content • System constraint: An email server may fail to send or receive email messages with/without notifying email users • (Exception) Email servers will notify users if sent mail cannot be delivered

16. Manage Catalyst content • Developers create the representations, relations, and system components that provide users access to content managed by Catalyst. • Catalyst is used to organize, store, query, retrieve or update content that is managed by Catalyst • Catalyst uses a (relational) database management system to organize, query, retrieve or update content that is stored in its database • (Exception) Catalyst stores data that identifies content, and controls access to content, stored as files in a networked file server, or as Web-based content accessed via the Web. • User constraint: Catalyst cannot be used to store arbitrary files for end-users. • System constraint: Catalyst cannot control updates to external content accessed via the Web.

17. Develop & Test Catalyst • Developers create the representations that other users utilize to create, insert, update or delete their content. • Developers create, insert, update and delete content stored in Catalyst representations to test its proper operations • (Exception) Developers cannot guarantee that all functions supported by Catalyst have been tested. • (Exception) Developers cannot guarantee that all functions supported by Catalyst are re-tested every time any Catalyst function or operation is modified (updated). • User constraint: Developers expect that users will notify them if the users encounter anomalies in Catalyst usage. • System constraint: Catalyst system components may fail to operate correctly even though they have been tested.

18. Access other Web content • Faculty can create content that contains Web hyperlinks • Users can select hyperlinked items • A selected item is downloaded into the User’s client if the Web server can retrieve the item. • (Exception) Users that select hyperlinked content will be disconnected from Catalyst after a certain elapsed time, unless they return to Catalyst • User constraint: Catalyst will not allow access to its content directly from the Web • System constraint: Catalyst may unexpectedly terminate a user session if a user accesses Web items that attempt to upload information into Catalyst, or launch applications unknown to Catalyst.

19. GSM Administrative Staff: Communicate & support faculty & students • Communicate with Faculty and Students about the status and availability of course content • Support and assist Faculty in getting content into Catalyst for download by Students

20. Dean’s Office: Fund, delegate, & promote • Fund the development, usage and maintenance of Catalyst at UCI GSM. • Delegate responsibility to manage Catalyst operations to UCI GSM GSM IS development staff. • Promote the existence and capabilities of Catalyst to other institutions and users to bring more recognition, funding, and end-users to UCI GSM.

21. Faculty: Provide high-quality course content • Faculty are encouraged by Dean's Office to use Catalyst to provide high-quality course content by creating, uploading, editing and downloading content for UCI GSM courses.

22. Faculty: Communicate, discuss, teach, & research • Faculty communicate concepts and discuss course problems and assignments with Students, as part of how they teach and do their research.

23. GSM IT Systems Support Staff: CentralizeISsupport and manage online course content • Centralize, organize and provide IT Systems support and manage online content services for all Catalyst users.

24. GSM IT Systems Support Staff:Help faculty, students, staff with hardware, software & network systems • Help support Faculty, MBA Students, GSM administrative staff and Dean's Office in their use of Catalyst and its components.

25. MBA Students: Communicate, discuss, & learn • MBA Students are encouraged by Dean's Office to use Catalyst to download content, communicate and discuss content with other MBA Students and Faculty as a way to learn more about the content. MBA Students may include others previously affiliated with the UCI GSM, such as "alumni".