What This Document Is
This document presents a solution to the “Eyes Have It” case study, used within the IT (TECH 001) course at Harvard University. The case study centers on TheEyesHavelt.com, an online exchange for used books, and requires the development of several Unified Modeling Language (UML) diagrams to model its system. This document provides those diagrams and accompanying descriptions.
Why This Document Matters
This solution is valuable for students enrolled in TECH 001 who are working to understand and apply UML modeling techniques. It serves as a reference point for completing the assigned case study and demonstrates how to visually represent system requirements and data structures. It’s particularly useful when reviewing concepts of use case diagrams, class diagrams, and state machine diagrams in the context of a real-world e-commerce application.
Common Limitations or Challenges
This document provides a *solution* to the case study, and while helpful for understanding, it should not be used as a substitute for independent problem-solving. Relying solely on this solution may hinder a student’s ability to apply UML concepts to new, unseen problems. It does not offer detailed explanations of *why* specific diagramming choices were made, or alternative modeling approaches.
What This Document Provides
The full document includes: a completed use case diagram for TheEyesHavelt.com, detailed descriptions of two use cases ("Add a Seller" and "Record a book order"), a domain model class diagram outlining the key entities and their relationships, and a state machine diagram illustrating the lifecycle of a book order. A partial listing of attributes for the `PhysicalBook` and `BuyerAccount` classes is also included. This preview *does not* include the full descriptions of the use cases, the complete class diagram with all attributes and methods, or the full state machine diagram. It also does not provide any explanations of the modeling choices made.
