TECHNICAL METHODOLOGY & VERIFICATION SPECIFICATION
MyGermanBD: Mathematical Model, Units & Reproducible Benchmarks
Role & Domain Intent: Beginner German practice (Vocabulary scheduling and selected lessons; not CEFR certification or visa advice.)
1. GOVERNING FORMULATION
Equations, Variables & Dimensional Rules
Beginner lessons, German/English/Bangla vocabulary scheduling and study planning.
Vocabulary Retention Bucket B_{t+1} = min(B_max, B_t + 1) on exact article + plural recall; reset to B_1 on gender/case mismatch
Declared Units: Trilingual vocabulary cards (Deutsch with der/die/das + plural, English, বাংলা); study blocks in minutes/week.
2. REPRODUCIBLE WORKED EXAMPLE
Step-by-Step Numerical Verification
Noun Gender & Case Drill: Practicing 'der Fahrplan / die Fahrpläne' (schedule — সময়সূচী) and 'Akkusativ vs. Dativ' prepositions verifies whether the learner recalls both the grammatical gender article and verb-second (V2) word order ('Morgen fahre ich nach Berlin'), logging results in the local study planner.
| Practice Area | Linguistic Feature | Explanation Languages | Certification Boundary |
|---|---|---|---|
| Noun & Article Deck | der / die / das + Plural forms | Deutsch + English + বাংলা | Independent practice (non-Goethe) |
| Sentence Structure | V2 Main Clause & Subordinate Verb-Final | Deutsch + English + বাংলা | Sample beginner lessons only |
| Study Planner | Spaced Review + JSON Backup | Bilingual UI controls | No visa or embassy guidance |
3. DATA PROVENANCE & OPERATIONAL BOUNDARIES
Validation Status, Scope Exclusions & Disclaimers
- Data Status: Synthetic / precomputed browser demonstration fixtures generated deterministically from the project engine.
- Operational Limitation: No proficiency certification, verified admission or visa guidance.
- Client-Side Execution: All interactive views, filters, and JSON/CSV exports execute locally in the user's browser with zero external API calls, zero telemetry, and no server-side persistence.
- Author & Principal Investigator: Mohammad Rezwan Khan, PhD (Aalborg University · BESS QA/QC & Power Systems Specialist).