CSC4902 is where the CSC4900 plan meets reality — implementation always surfaces gaps and unforeseen challenges the design phase didn't anticipate, and this course teaches students to adapt their plan responsibly rather than abandoning it at the first obstacle.
Implementation against the capstone design
CSC4902 focuses on disciplined implementation: building the system according to the CSC4900 design while tracking and documenting any necessary deviations, since real implementation almost always reveals design gaps or infeasible assumptions. Students practice version control discipline, incremental development with regular working builds rather than a single big-bang integration at the end, and honest documentation of scope adjustments made along the way.
Testing, documentation, and final presentation
The course covers software testing practices appropriate to the capstone scale — unit testing, integration testing, and user acceptance testing against the original requirements — along with the professional documentation (technical documentation, user guide, and a reflective project report) and presentation skills needed to defend the finished project to a capstone committee, articulating both what was built and the engineering reasoning behind key decisions.
Key topics in CSC4902
- Disciplined implementation against a design specification, with documented deviations
- Version control practices and incremental development with regular working builds
- Unit testing, integration testing, and user acceptance testing against requirements
- Technical documentation and user guide creation for the completed system
- Reflective project reporting: what worked, what changed, and lessons learned
- Capstone defense presentation: articulating and justifying engineering decisions
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Worked example: documenting a necessary design deviation
- Original design: CSC4900 plan specified a relational database for all application data
- Implementation discovery: A specific feature (activity feed) performs far better with a document-based data structure due to its variable, nested data shape
- Deviation decision: Adopt a hybrid approach — relational database for core structured data, a lightweight document store for the activity feed specifically
- Documentation: The reflective project report explains the original assumption, why it broke down during implementation, and the reasoning behind the adapted architecture
- Lesson: A capstone committee values honest, well-reasoned adaptation over a report claiming everything went exactly according to the original plan
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Capstone implementation, testing, and defense-presentation assignments.
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Frequently asked questions
In professional software engineering, project plans virtually always evolve during implementation as teams discover incorrect assumptions, technical constraints not visible during design, or better approaches that only become apparent once building begins — the ability to recognize when a deviation is necessary, make a reasoned decision, and document the change is itself a core engineering competency, arguably more valuable than being able to follow a plan that happened to be perfect from the start. CSC4902 requires this documentation because it reveals whether a student engaged in genuine engineering judgment during implementation or simply built something without critically evaluating their own design choices along the way — a capstone committee evaluating only the final working product has no way to distinguish between a student who thoughtfully adapted to real implementation challenges and one who got lucky with an initial design that never needed to change, so the deviation documentation makes that engineering judgment visible and assessable.
Building an entire complex system before any testing (sometimes called "big-bang integration") creates enormous risk: if something is fundamentally broken, it may not be discovered until very late in the project timeline, when there's little time left to diagnose and fix the problem, and the root cause can be extremely difficult to isolate when many components are being integrated and tested simultaneously for the first time. Incremental development — building and testing small, working pieces of functionality regularly throughout the project — surfaces problems early, when they're cheaper and easier to fix, and provides continuous validation that the project is actually on track rather than discovering a critical flaw only at the final integration step. CSC4902 teaches this practice because it mirrors how professional software teams actually work (continuous integration, frequent small releases) and because, practically, a student who has a working (if incomplete) system throughout the term has a functional fallback to present even if a late-stage feature doesn't fully materialize, whereas a student following a big-bang approach risks having nothing demonstrable if a late integration attempt fails.