The first SAT checkpoint covers your design brief, your project plan (Gantt chart in GitHub Projects), and how you keep that plan trustworthy through the year.

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Short explainers with diagrams and videos for the concepts you'll be quizzed on at validation:

- [Problem-Solving Methodology](/sd/C01/Problem-Solving%20Methodology) — the four stages (Analysis, Design, Development, Evaluation) and their activities

- [Testing vs Validation vs Evaluation](/sd/C01/Testing%20vs%20Validation%20vs%20Evaluation) — three similar-sounding terms that mean different things

- [Critical Path](/sd/C01/Critical%20Path) — the longest chain of dependent tasks; how to find it and why it matters for C1-3

- [TELOS Feasibility](/sd/C01/TELOS%20Feasibility) — Technical, Economic, Legal, Operational, Scheduling — the feasibility framework for your design brief

- [Roadmap View vs Gantt Chart](/sd/C01/Roadmap%20View%20vs%20Gantt%20Chart) — what GitHub Projects renders, what it doesn't, and how to close the gap

- [AI Disclosure](/sd/C01/AI%20Disclosure) — how to log AI use so your work stays authentic

- [Mr Chen's SAT GitHub Projects](/sd/C01/Mr%20Chen's%20SAT%20GitHub%20Projects) — a video walk-through of the same kind of project board you're building, on a real complete example

- [Overflow](/sd/C01/Overflow)

- [C01 Resources](/sd/Resources/C01-Resources) — per-checkpoint reading and reference material

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