[G1-Sync] Manual knowledge update

2026-05-10 22:08:15 +09:00
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+---
+id: quality-tech-radar
+title: Tech Radar — adopt / trial / assess / hold
+category: Coding
+status: draft
+source_trust_level: B
+verification_status: conceptual
+created_at: 2026-05-09
+updated_at: 2026-05-09
+tags: [quality, technology, vibe-coding]
+tech_stack: { language: "process", applicable_to: ["Engineering"] }
+applied_in: []
+aliases: [tech radar, ThoughtWorks, technology assessment, adopt trial assess hold, decision making]
+---
+
+# Tech Radar
+
+> ThoughtWorks 의 framework. **매 6 month, 매 tech 의 status (adopt / trial / assess / hold)**. Team 의 alignment + decision.
+
+## 📖 핵심 개념
+- 매 quadrant: language / framework / tool / platform.
+- 매 ring: adopt / trial / assess / hold.
+- 매 6 month update.
+- Public 또는 internal.
+
+## 💻 코드 패턴
+
+### 4 ring
+```
+ADOPT:
+- Production-proven.
+- Team 가 default.
+- 매 새 project.
+
+TRIAL:
+- 작은 production trial.
+- Pilot project.
+- 1-2 team.
+
+ASSESS:
+- 실험 가능.
+- Watch carefully.
+- Learn.
+
+HOLD:
+- 새 project 가 안 됨.
+- 기존 = migrate plan.
+- 매 새 use 가 justify.
+```
+
+### 4 quadrant
+```
+- Languages & Frameworks (TS, React, ...).
+- Tools (Vite, ESLint, ...).
+- Platforms (AWS, Cloudflare, ...).
+- Techniques (TDD, microservice, ...).
+```
+
+### 예 (engineering team)
+```
+ADOPT:
+- TypeScript
+- React + Compiler
+- Tailwind 4
+- Postgres
+- Vite
+- Vitest
+
+TRIAL:
+- TanStack Start
+- Cloudflare Workers
+- Hono
+- Bun
+- DuckDB
+
+ASSESS:
+- SolidJS
+- Qwik
+- Effect-TS
+- Compose Multiplatform
+- Helix editor
+
+HOLD:
+- jQuery (legacy 만)
+- Webpack (Vite migrate)
+- Class component (functional 만)
+- Sass (CSS modern)
+```
+
+### Process
+```
+1. 매 6 month review.
+2. 매 engineer 가 propose tech.
+3. Discussion + vote.
+4. Update radar.
+5. Communicate (all-hands).
+6. Implement (migrate plan if hold).
+```
+
+### Internal radar
+```
+Company-specific.
+- 매 team 의 input.
+- Tech council 가 decide.
+- Documented + searchable.
+```
+
+### Public radar (ThoughtWorks)
+```
+thoughtworks.com/radar.
+- 매 6 month update.
+- Industry trends.
+- 매 entry 의 reasoning.
+```
+
+→ Reference 만. Each company 가 own.
+
+### 매 entry 의 doc
+```markdown
+# React + Compiler
+
+Status: Adopt
+Quadrant: Languages & Frameworks
+Updated: 2026-05-09
+
+## Why
+- Type-safe.
+- Modern (auto memo).
+- 큰 ecosystem.
+
+## When
+- All new web projects.
+- Migrate Class component.
+
+## When NOT
+- 매우 작은 (Astro 가 더).
+- Native mobile (RN OK).
+
+## Reference
+- [Decision: React vs Vue](#)
+```
+
+### Migration (HOLD → ADOPT)
+```
+Old: Webpack (HOLD).
+New: Vite (ADOPT).
+
+Plan:
+- New project: Vite (immediate).
+- Old project: migrate over 6-12 month.
+- Tooling support (build script, docs).
+- Knowledge sharing (brown bag).
+```
+
+### Conflict resolution
+```
+Engineer A: "Adopt SolidJS now".
+Engineer B: "Hold, React 가 좋음".
+
+Process:
+- Pros / cons doc.
+- Trial pilot (small project).
+- 6 month 후 review.
+- Decision based on data.
+```
+
+### Tech debt 의 visibility
+```
+Hold = tech debt.
+- 매 quarter 의 migration status.
+- "이 5 codebase 가 Sass = migrate by Q4".
+- Engineering metric.
+```
+
+### Tech radar 의 가치
+```
+- Alignment (모든 사람 가 같은 tech 사용).
+- Onboarding (새 사람 = radar 읽음).
+- Decision (이 tech 가 OK?).
+- Communication (manager 가 understand).
+
+→ "Stack 가 무엇" 의 single source.
+```
+
+### 함정
+```
+- 매년 한 번만 update: stale.
+- 매 month update: noisy.
+- Engineer input 없음: top-down.
+- Public 없음: 외부 candidate 가 모름.
+- "Hold" 무시: migrate 안 됨.
+- Hype-driven: adopt before stable.
+```
+
+### Adoption curve
+```
+새 tech 의 lifecycle:
+1. Innovator (early adopter).
+2. Early majority.
+3. Late majority.
+4. Laggard.
+
+→ Adopt 가 late majority 시점.
+Trial 이 early majority.
+Assess 가 early adopter.
+```
+
+### 매 company 의 radar
+- **Spotify**: golden path (preferred stack).
+- **Atlassian**: tech radar.
+- **Zalando**: 매 quarter 발표.
+- **Netflix**: paved road.
+
+### "Paved road" / "Golden path"
+```
+Tech radar 의 implementation.
+- 1 stack 가 default.
+- Tooling + doc + support.
+- 매 deviation = justify.
+
+→ "Innovation 의 cost ↓" + "Maintenance 의 share ↑".
+```
+
+### vs ThoughtWorks Radar
+```
+Industry radar:
+- General trend.
+- 큰 picture.
+
+Internal radar:
+- Specific stack.
+- Migrate plan.
+
+→ 둘 다 사용. Internal 가 actionable.
+```
+
+### Build / buy / open source
+```
+매 entry 의 추가 dimension:
+- Build: 자체 build.
+- Buy: SaaS / vendor.
+- Open: open source.
+
+→ Cost / control / community trade-off.
+```
+
+### Risk assessment
+```
+매 tech 의:
+- Maturity (new vs old).
+- Community (small vs big).
+- Vendor lock-in.
+- Migration cost.
+- Performance.
+- Security history.
+
+→ Multi-dimensional 결정.
+```
+
+### Communication
+```
+- Quarterly all-hands: update.
+- Wiki / Notion: searchable.
+- Slack #tech-radar: discussion.
+- 매 ADR 가 radar reference.
+```
+
+### CTO / Architect 의 role
+```
+- Curator (의제, decision).
+- Cross-team alignment.
+- 외부 trend watch.
+- Risk balance.
+
+→ "What tech 가 우리 가 사용?" 의 answer.
+```
+
+## 🤔 의사결정 기준
+| 상황 | 추천 |
+|---|---|
+| 큰 org | Internal radar |
+| 작은 startup | 1 stack (no radar) |
+| Multi-team alignment | Tech radar |
+| New tech | Assess / Trial |
+| Migration | Hold + plan |
+
+## ❌ 안티패턴
+- **No radar**: 매 team 가 다른 stack.
+- **Stale radar**: 1 year old.
+- **Top-down only**: engineer input X.
+- **Hype-driven**: unstable.
+- **Hold 무시**: 점진 fix X.
+- **모든 tech adopt**: complexity.
+
+## 🤖 LLM 활용 힌트
+- Adopt / Trial / Assess / Hold = 4 ring.
+- 매 6 month update.
+- Engineering decision 의 alignment.
+- Public (ThoughtWorks) 가 reference.
+
+## 🔗 관련 문서
+- [[Productivity_Documentation]]
+- [[Productivity_Knowledge_Sharing]]
+- [[Quality_Tech_Debt]]