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Book a ConsultationStart with “templates first.” CapEx into: discovery/architecture, migration, QA/performance, cutover/hypercare. Benchmarks: 10–15% · 50–65% · 10–15% · 5–10%. Drivers: #page types, i18n/SEO, integrations. Cost control via feature flags, canary, gates.
URL parity, self-canonicals, complete alternates.languages (incl. x-default), typed sitemaps. Before cutover: SERP smoke tests; rollout via traffic splits; monitor CTR/indexing — if off, rollback or fine-tune. Breadcrumb stabilizes path structure; use FAQ schema selectively.
Performance: LCP ≤ 2.5 s · INP ≤ 200 ms · CLS ≤ 0.1 (p75, mobile).
Release health: error rate ≤ threshold, E2E green.
SEO: canonical/alternates OK, sitemaps valid, CTR/impressions ≥ baseline.
Business: conversion/lead quality neutral or ↑.
8–16 weeks: Discovery (1–2) → Foundation (1–3) → Pilot/Canary (2–4) → Expansion (2–6) → Cutover (1) → Hypercare (1–2).
Strangler pattern: gradual replacement behind flags, contract/E2E tests, observable KPIs. Fallbacks per integration, test timeouts/failure modes. Canary to internal/beta first, then broader. Document SLA/SLOs, incident runbook + rollback button.
Christian Salat
Start with “templates first.” CapEx into: discovery/architecture, migration, QA/performance, cutover/hypercare. Benchmarks: 10–15% · 50–65% · 10–15% · 5–10%. Drivers: #page types, i18n/SEO, integrations. Cost control via feature flags, canary, gates.
URL parity, self-canonicals, complete alternates.languages (incl. x-default), typed sitemaps. Before cutover: SERP smoke tests; rollout via traffic splits; monitor CTR/indexing — if off, rollback or fine-tune. Breadcrumb stabilizes path structure; use FAQ schema selectively.
Performance: LCP ≤ 2.5 s · INP ≤ 200 ms · CLS ≤ 0.1 (p75, mobile).
Release health: error rate ≤ threshold, E2E green.
SEO: canonical/alternates OK, sitemaps valid, CTR/impressions ≥ baseline.
Business: conversion/lead quality neutral or ↑.
8–16 weeks: Discovery (1–2) → Foundation (1–3) → Pilot/Canary (2–4) → Expansion (2–6) → Cutover (1) → Hypercare (1–2).
Strangler pattern: gradual replacement behind flags, contract/E2E tests, observable KPIs. Fallbacks per integration, test timeouts/failure modes. Canary to internal/beta first, then broader. Document SLA/SLOs, incident runbook + rollback button.
Start with “templates first.” CapEx into: discovery/architecture, migration, QA/performance, cutover/hypercare. Benchmarks: 10–15% · 50–65% · 10–15% · 5–10%. Drivers: #page types, i18n/SEO, integrations. Cost control via feature flags, canary, gates.
URL parity, self-canonicals, complete alternates.languages (incl. x-default), typed sitemaps. Before cutover: SERP smoke tests; rollout via traffic splits; monitor CTR/indexing — if off, rollback or fine-tune. Breadcrumb stabilizes path structure; use FAQ schema selectively.
Performance: LCP ≤ 2.5 s · INP ≤ 200 ms · CLS ≤ 0.1 (p75, mobile).
Release health: error rate ≤ threshold, E2E green.
SEO: canonical/alternates OK, sitemaps valid, CTR/impressions ≥ baseline.
Business: conversion/lead quality neutral or ↑.
8–16 weeks: Discovery (1–2) → Foundation (1–3) → Pilot/Canary (2–4) → Expansion (2–6) → Cutover (1) → Hypercare (1–2).
Strangler pattern: gradual replacement behind flags, contract/E2E tests, observable KPIs. Fallbacks per integration, test timeouts/failure modes. Canary to internal/beta first, then broader. Document SLA/SLOs, incident runbook + rollback button.
Why now? The App Router standardizes data fetching, streaming and RSC → faster pages, less client JS, simpler maintenance. Practical hreflang/canonical/i18n guidance: Next.js SEO Guide.
If you want to manage migration without roadmap freeze, our Next.js Agency supports you with Budget-Guardrails, Canary & KPI-Gates.
Decisions (CFO/CTO):
- Scope: 2 page types with 80% impact (pilot)
- Budget corridor: CapEx per phase (± x%), OpEx ceilings
- Gates: p75 targets (LCP/INP/CLS), error budget, SEO smoke tests
How we measure success:
- CWV p75 (mobile): LCP ≤ 2.5 s · INP ≤ 200 ms · CLS ≤ 0.1
- Release health: error rate ≤ threshold · E2E/visual green
- SEO/i18n: CTR & impressions per page type/market neutral or ↑
Details on LCP/INP/CLS p75 gates & measurement in the Next.js Performance Guide.
CapEx (one-off)
OpEx (ongoing)
Hosting/edge (SSR/streaming/ISR), bandwidth/CDN · Monitoring/logging (APM, RUM, error tracking) · Lifecycle (RSC upkeep, updates, security)
You will receive the initial migration audit as part of our Next.js expert team - including a 30/60/90-day plan.
Quality gates before merge/release
Steering deck (weekly)
CWV trend (RUM mobile), error budget/SLO, SEO & i18n (CTR/impressions per page type & market, hreflang validity, indexing), release health (deploy frequency, CFR, MTTR, rollbacks), business metrics (conversion/leads/TTF).
Owner principle: each KPI bundle has 1 owner.
Routing & URL parity
1:1 mapping old ↔ new; 301 only when necessary. Query/state consistent for campaigns. SERP smoke tests for top keywords before cutover.
Performance from day 1
LCP image fixed dimensions + preload (not lazy). Local fonts with font-display: swap. Minimize client JS (client components only for interaction), budget third-party scripts. Streaming SSR for fast TTFB.
SEO hygiene
Per-route Metadata API: title, description, canonical, alternates.languages. Typed sitemaps per market/page type; incremental pings after deploy. Breadcrumb as a stable schema signal; FAQ only selectively.
A11y & quality
Semantic components, focus styles, skip links. Axe in CI + small screen reader sample. Visual regression for hero/nav/forms.
Security & compliance
CSP, HSTS, Referrer-/Permissions-Policy. CSRF, rate limiting, server-side validation. Document PII/DSR flows; verify delete/export routines.
Continuity
Monthly steering, dependency hygiene, defend performance budget.
Performance budget (RUM p75 mobile)
Release policy
Feature flags for risky changes. Canary steps 1% → 10% → 25% → 50% → 100%. Rollback button automated & tested; post-mortems.
SEO gate (per PR/deploy)
Title/description within corridor, no duplicates. alternates.languages complete, self-canonical set. Sitemaps updated, robots stable, SERP preview OK.
// app/[locale]/[...segments]/layout.tsx
export const dynamic = 'force-dynamic'; // deliberately control: SSR/ISR per template
export async function generateMetadata({ params }) {
const { locale } = params;
const url = `https://www.example.com/${locale}/guide/next-js/next-js-migration/`;
return {
title: "Next.js Migration – Budget Guardrails, Risk Heatmap & Ownership",
description: "CFO/CTO briefing: CapEx/OpEx, risk control, RACI, milestones & KPI gates.",
alternates: {
canonical: url,
languages: {
"de-DE": "https://www.example.com/de/guide/next-js/next-js-migration/",
"en-US": "https://www.example.com/en/guide/next-js/next-js-migration/"
}
}
};
}
Goal of the snippet: Show that metadata & i18n are maintained deterministically per route — foundation for stable SERP signals during the migration.
Why? Per route, canonical and alternates.languages are deterministic → stable SERP signals.
Effect: Clear crawl path, less cannibalization, clean i18n indexing.
Thesis: Migration is a steering problem — with a budget corridor, risk gates, clear ownership and tested rollbacks, it becomes predictable.
Technical lever (App Router): server-first, RSC, streaming → performance up, complexity down, but only with governance + observability.
Next steps
Why now? The App Router standardizes data fetching, streaming and RSC → faster pages, less client JS, simpler maintenance. Practical hreflang/canonical/i18n guidance: Next.js SEO Guide.
If you want to manage migration without roadmap freeze, our Next.js Agency supports you with Budget-Guardrails, Canary & KPI-Gates.
Why now? The App Router standardizes data fetching, streaming and RSC → faster pages, less client JS, simpler maintenance. Practical hreflang/canonical/i18n guidance: Next.js SEO Guide.
If you want to manage migration without roadmap freeze, our Next.js Agency supports you with Budget-Guardrails, Canary & KPI-Gates.
Decisions (CFO/CTO):
- Scope: 2 page types with 80% impact (pilot)
- Budget corridor: CapEx per phase (± x%), OpEx ceilings
- Gates: p75 targets (LCP/INP/CLS), error budget, SEO smoke tests
How we measure success:
- CWV p75 (mobile): LCP ≤ 2.5 s · INP ≤ 200 ms · CLS ≤ 0.1
- Release health: error rate ≤ threshold · E2E/visual green
- SEO/i18n: CTR & impressions per page type/market neutral or ↑
Details on LCP/INP/CLS p75 gates & measurement in the Next.js Performance Guide.
CapEx (one-off)
OpEx (ongoing)
Hosting/edge (SSR/streaming/ISR), bandwidth/CDN · Monitoring/logging (APM, RUM, error tracking) · Lifecycle (RSC upkeep, updates, security)
You will receive the initial migration audit as part of our Next.js expert team - including a 30/60/90-day plan.
Quality gates before merge/release
Steering deck (weekly)
CWV trend (RUM mobile), error budget/SLO, SEO & i18n (CTR/impressions per page type & market, hreflang validity, indexing), release health (deploy frequency, CFR, MTTR, rollbacks), business metrics (conversion/leads/TTF).
Owner principle: each KPI bundle has 1 owner.
Quality gates before merge/release
Steering deck (weekly)
CWV trend (RUM mobile), error budget/SLO, SEO & i18n (CTR/impressions per page type & market, hreflang validity, indexing), release health (deploy frequency, CFR, MTTR, rollbacks), business metrics (conversion/leads/TTF).
Owner principle: each KPI bundle has 1 owner.
Routing & URL parity
1:1 mapping old ↔ new; 301 only when necessary. Query/state consistent for campaigns. SERP smoke tests for top keywords before cutover.
Performance from day 1
LCP image fixed dimensions + preload (not lazy). Local fonts with font-display: swap. Minimize client JS (client components only for interaction), budget third-party scripts. Streaming SSR for fast TTFB.
SEO hygiene
Per-route Metadata API: title, description, canonical, alternates.languages. Typed sitemaps per market/page type; incremental pings after deploy. Breadcrumb as a stable schema signal; FAQ only selectively.
A11y & quality
Semantic components, focus styles, skip links. Axe in CI + small screen reader sample. Visual regression for hero/nav/forms.
Security & compliance
CSP, HSTS, Referrer-/Permissions-Policy. CSRF, rate limiting, server-side validation. Document PII/DSR flows; verify delete/export routines.
Continuity
Monthly steering, dependency hygiene, defend performance budget.
Continuity
Monthly steering, dependency hygiene, defend performance budget.
Performance budget (RUM p75 mobile)
Release policy
Feature flags for risky changes. Canary steps 1% → 10% → 25% → 50% → 100%. Rollback button automated & tested; post-mortems.
SEO gate (per PR/deploy)
Title/description within corridor, no duplicates. alternates.languages complete, self-canonical set. Sitemaps updated, robots stable, SERP preview OK.
Performance budget (RUM p75 mobile)
Release policy
Feature flags for risky changes. Canary steps 1% → 10% → 25% → 50% → 100%. Rollback button automated & tested; post-mortems.
SEO gate (per PR/deploy)
Title/description within corridor, no duplicates. alternates.languages complete, self-canonical set. Sitemaps updated, robots stable, SERP preview OK.
// app/[locale]/[...segments]/layout.tsx
export const dynamic = 'force-dynamic'; // deliberately control: SSR/ISR per template
export async function generateMetadata({ params }) {
const { locale } = params;
const url = `https://www.example.com/${locale}/guide/next-js/next-js-migration/`;
return {
title: "Next.js Migration – Budget Guardrails, Risk Heatmap & Ownership",
description: "CFO/CTO briefing: CapEx/OpEx, risk control, RACI, milestones & KPI gates.",
alternates: {
canonical: url,
languages: {
"de-DE": "https://www.example.com/de/guide/next-js/next-js-migration/",
"en-US": "https://www.example.com/en/guide/next-js/next-js-migration/"
}
}
};
}
Goal of the snippet: Show that metadata & i18n are maintained deterministically per route — foundation for stable SERP signals during the migration.
Why? Per route, canonical and alternates.languages are deterministic → stable SERP signals.
Effect: Clear crawl path, less cannibalization, clean i18n indexing.
Thesis: Migration is a steering problem — with a budget corridor, risk gates, clear ownership and tested rollbacks, it becomes predictable.
Technical lever (App Router): server-first, RSC, streaming → performance up, complexity down, but only with governance + observability.
Next steps
Thesis: Migration is a steering problem — with a budget corridor, risk gates, clear ownership and tested rollbacks, it becomes predictable.
Technical lever (App Router): server-first, RSC, streaming → performance up, complexity down, but only with governance + observability.
Next steps
Note: Budget discipline comes from top templates first, feature flags, and canary instead of big-bang.
Cost block | Effort | Drivers | Budget share |
---|---|---|---|
Discovery & architecture | 2–4 weeks | code complexity, integrations | 10–15% CapEx |
CI/CD & observability | 1–2 weeks | pipelines, alerting, SLOs | 5–10% CapEx |
Template migration | 4–8+ weeks | #types, i18n, SEO | 50–65% CapEx |
QA (E2E, a11y, SEO, perf) | ongoing | coverage, tooling | 10–15% CapEx |
Cutover & hypercare | 1–2 weeks | parallel run | 5–10% CapEx |
Decisions (CFO/CTO):
- Scope: 2 page types with 80% impact (pilot)
- Budget corridor: CapEx per phase (± x%), OpEx ceilings
- Gates: p75 targets (LCP/INP/CLS), error budget, SEO smoke tests
How we measure success:
- CWV p75 (mobile): LCP ≤ 2.5 s · INP ≤ 200 ms · CLS ≤ 0.1
- Release health: error rate ≤ threshold · E2E/visual green
- SEO/i18n: CTR & impressions per page type/market neutral or ↑
Details on LCP/INP/CLS p75 gates & measurement in the Next.js Performance Guide.
CapEx (one-off)
OpEx (ongoing)
Hosting/edge (SSR/streaming/ISR), bandwidth/CDN · Monitoring/logging (APM, RUM, error tracking) · Lifecycle (RSC upkeep, updates, security)
You will receive the initial migration audit as part of our Next.js expert team - including a 30/60/90-day plan.
Routing & URL parity
1:1 mapping old ↔ new; 301 only when necessary. Query/state consistent for campaigns. SERP smoke tests for top keywords before cutover.
Performance from day 1
LCP image fixed dimensions + preload (not lazy). Local fonts with font-display: swap. Minimize client JS (client components only for interaction), budget third-party scripts. Streaming SSR for fast TTFB.
SEO hygiene
Per-route Metadata API: title, description, canonical, alternates.languages. Typed sitemaps per market/page type; incremental pings after deploy. Breadcrumb as a stable schema signal; FAQ only selectively.
A11y & quality
Semantic components, focus styles, skip links. Axe in CI + small screen reader sample. Visual regression for hero/nav/forms.
Security & compliance
CSP, HSTS, Referrer-/Permissions-Policy. CSRF, rate limiting, server-side validation. Document PII/DSR flows; verify delete/export routines.
// app/[locale]/[...segments]/layout.tsx
export const dynamic = 'force-dynamic'; // deliberately control: SSR/ISR per template
export async function generateMetadata({ params }) {
const { locale } = params;
const url = `https://www.example.com/${locale}/guide/next-js/next-js-migration/`;
return {
title: "Next.js Migration – Budget Guardrails, Risk Heatmap & Ownership",
description: "CFO/CTO briefing: CapEx/OpEx, risk control, RACI, milestones & KPI gates.",
alternates: {
canonical: url,
languages: {
"de-DE": "https://www.example.com/de/guide/next-js/next-js-migration/",
"en-US": "https://www.example.com/en/guide/next-js/next-js-migration/"
}
}
};
}
Goal of the snippet: Show that metadata & i18n are maintained deterministically per route — foundation for stable SERP signals during the migration.
Why? Per route, canonical and alternates.languages are deterministic → stable SERP signals.
Effect: Clear crawl path, less cannibalization, clean i18n indexing.
Roles:
Deliverable | R (Responsible) | A (Accountable) | C (Consulted) | I (Informed) |
---|---|---|---|---|
Architecture blueprint & RSC guides | Eng Lead | CTO | Perf, Security, Product | CFO |
URL mapping & SEO gates | SEO Lead | CTO | Product, Eng | CFO |
Performance budget (p75) | Perf Owner | CTO | SEO, Eng | CFO |
Test strategy & gates | QA Lead | CTO | Eng, SEO | CFO |
Budget/controlling | CFO | CFO | CTO | Product, Eng |
Cutover plan & rollback | Eng Lead | CTO | Product, SEO, QA | CFO |
Every high-risk item has a technical rollback (traffic splits, feature flags) and a business fallback (timing window, stakeholder comms, support plan). For i18n use reciprocal hreflang pairs incl. x-default and self-canonicals; consolidate canonicals. See Guidelines for local versions (hreflang) und Canonical-Konsolidation.
You approve:
- Risk register v1 (likelihood × impact × countermeasure)
- Rollback path: 1-click ≤ 15 min, tested
- Owner per risk: SEO, Perf, Eng, i18n, QA, Platform
How we control risk:
- Canary KPIs by stage (1 → 10 → 25 …)
- GSC smoke tests (indexing, CTR)
- Error budget/MTTR trend
Risk | Likelihood | Impact | Countermeasure/Gate | Owner |
---|---|---|---|---|
SEO visibility drop (routing/canonicals/hreflang) | M | H | URL mapping, self-canonicals, alternates.languages, typed sitemaps, SERP smoke tests pre-cutover | SEO Lead |
Performance regression (CWV) | M | H | p75 gates (LCP ≤ 2.5 s, INP ≤ 200 ms, CLS ≤ 0.1), lab→RUM corridor, stabilize LCP asset | Perf Owner |
Architecture decisions
- Render per page type: content = ISR, personalized/checkout = SSR/streaming
- Client JS budget: Client Components only when interaction is needed
- i18n/SEO: subfolder scheme, alternates.languages, self-canonical
What we check
- Client bundle trend per template
- LCP asset (fixed dimensions, preload)
- Hreflang pairs incl. x-default are valid
App Router & server-first
Caching & delivery
i18n & SEO
Observability & release health
L-M |
H |
e2e login flows, CSRF/session tests, shared cookie domains, controlled cache headers |
Eng Lead |
i18n/hreflang errors | M | M-H | subfolder consistency, reciprocal pairs + x-default, market sitemaps, QA samples | i18n Owner |
A11y regressions | M | M | WCAG linting, Axe in CI, manual screen reader spot checks | QA Lead |
Build/bundle instability | M | M | lockfile policy, canary builds, artifact promotion, rollback button | Platform Eng |
Data-fetching mis-design | L-M | M | “server-first” conventions, RSC boundary guides, shared util layer, code reviews | Arch Lead |