Architecture Documentation and Communication Questions

Purpose / Executive Summary

• One-line recommendation (chosen option) and why (business impact + high-level technical fit)
• Context: product area, stakeholders, decision owner (you), date

Problem Statement

• What user/business problem, scope, constraints, and non-goals
• Example: "Reduce API latency from 300ms → <100ms for Partner Integrations (Q3)."

Alternatives Considered

• Short list (A, B, C) with one-line descriptions and estimate ranges (cost, effort, infra)

Evaluation Criteria

• Weighted criteria (example): Business impact 40%, Technical risk 25%, Cost 15%, Time-to-market 20%

Quantitative Scoring

• Table: Alternatives × Criteria with scores (0–10) and weighted totals
• Example row: A: 8,7,5,6 → weighted = 7.05
• State assumptions behind numbers

Key Risks & Mitigations

• Risk 1: e.g., dependency on third-party SDK — Mitigation: pilot with test partner
• Risk 2: backward compatibility — Mitigation: feature flag + canary release

Roadmap / Timeline

• Milestones (design, prototype, sprint delivery, beta, GA) with owners and dates
• Resource assumptions (team size, infra)

Rollback / Exit Criteria

• Concrete triggers (error rate > X%, latency regressions, partner churn signal)
• Steps to rollback (feature-flag off, revert deploy, communicate)

Success Metrics (Measurable)

• KPIs: 95th-percentile latency <100ms, API error rate <0.1%, partner throughput +20%, adoption % by month 3
• Measurement plan and dashboards

Ask / Decision Required

• Specific approvals needed (budget, timeline, go/no-go milestones)

Notes: keep slides to 8–10, include appendix with detailed cost estimates, benchmarks, and test plan.

Approach (TPM perspective)
I standardize ADRs to keep cross-team decisions discoverable, auditable, and actionable so product, platform, and engineering can align on trade-offs and rollback plans.

Standard ADR template (fields)

• Title / ID / Date
• Status (Proposed / Accepted / Deprecated)
• Context / Problem — short user/product impact description
• Decision — concise statement of chosen approach and scope
• Alternatives Considered — 2–4 viable options, brief pros/cons for each
• Trade-offs & Rationale — technical, product, cost, time-to-market, UX impacts
• Testing & Validation Plan — acceptance criteria, metrics (SLOs, error rates), test environments, canary plan
• Rollback / Mitigation Plan — triggers, steps to revert, data-migration reversal, communication plan
• Dependencies & Impacted Services — list teams, APIs, data models, downstream consumers
• Security & Compliance Notes — risks and required approvals
• Ownership & Reviewers — decision owner (team/product), reviewers, review cadence
• Rollout Timeline & Monitoring — phased rollout plan, dashboards, alert thresholds
• Links & Artifacts — diagrams, RFCs, tickets, benchmarks

Why this works
This template balances product impact with engineering detail, makes auditing straightforward, and assigns clear ownership so future engineers can reproduce, validate, or reverse the decision.