Hyvä development for enterprise retailers with multi-warehouse – Checklist

Enterprise Hyvä implementation requires 14-16 week phased approach: pre-migration audit (week 1-2), environment setup (week 3-5), custom module development (week 6-10), warehouse integration (week 11-13), testing & go-live (week 14-16). This checklist covers 87 critical milestones ensuring production readiness for multi-warehouse retailers managing 5-50+ SKUs across multiple locations.

Pre-Implementation Phase (Weeks 1-2)

Technical Audit

• [ ] Document current Magento version
• [ ] Verify 2.4.6+ compatibility (Hyvä requirement)
• [ ] List all installed extensions (identify retire/migrate/rebuild candidates)
• [ ] Check custom module count and complexity
• [ ] Audit database size and transaction volume

• [ ] Document API integrations (payment, fulfillment, ERP, WMS)

• [ ] Performance baseline

• [ ] Measure current LCP, FCP, CLS on product/category/checkout pages
• [ ] Record Core Web Vitals via Google Search Console
• [ ] Document average API response times (inventory, cart, search)
• [ ] Capture P99 latency under peak load

• [ ] Screenshot user experience (page load speed, interaction responsiveness)

• [ ] Warehouse operations audit

• [ ] List all warehouse locations
• [ ] Document inventory sync frequency (real-time? hourly? daily?)
• [ ] Map fulfillment logic (zone-based? SKU-based? carrier-based?)
• [ ] Identify WMS system (custom? Shopify Fulfillment? 3PL?)
• [ ] Document current inventory display UI (product pages, cart, checkout)

• [ ] List warehouse-related integrations (ERP, TMS, forecasting)

• [ ] Custom code audit

• [ ] Identify all custom frontend modules
• [ ] Identify all custom backend modules touching storefront
• [ ] Assess feasibility of migration vs. rebuild vs. retire
• [ ] Document custom CSS and JavaScript
• [ ] List custom template overrides

• [ ] Identify deprecated patterns (knockout observers, core template hacks)

• [ ] Third-party integration inventory

• [ ] Payment processors (Stripe, Adyen, PayPal, etc.)
• [ ] Fulfillment systems (ShipStation, EasyPost, custom WMS)
• [ ] Tax calculation (Avalara, TaxJar)
• [ ] Accounting integration (QuickBooks, NetSuite)
• [ ] Marketing platforms (Klaviyo, Segment)
• [ ] Analytics (GA4, Mixpanel)
• [ ] Search engine (Elasticsearch, Algolia, Klevu)
• [ ] Verify each has documented REST/GraphQL API

Stakeholder Alignment

• [ ] Define success metrics
• [ ] Specify target LCP/FCP/CLS improvements
• [ ] Target inventory sync latency (real-time? 60-second? 5-minute?)
• [ ] Expected feature velocity post-go-live (features per sprint)
• [ ] Uptime SLA (99.9%? 99.99%?)

• [ ] Acceptable migration downtime (4 hours? 0 hours?)

• [ ] Identify team structure

• [ ] Assign technical lead (yours or implementation partner)
• [ ] Warehouse operations sponsor (owns inventory/fulfillment requirements)
• [ ] Frontend/UX lead (owns storefront changes)
• [ ] Infrastructure/DevOps lead (owns deployment, scaling)
• [ ] QA lead (owns test strategy)

• [ ] Schedule weekly sync meetings

• [ ] Budget & timeline sign-off

• [ ] Confirm 14-16 week implementation timeline
• [ ] Approve implementation partner and costs
• [ ] Reserve engineering capacity (can’t do this + major features simultaneously)
• [ ] Plan for post-go-live support (embedded engineers for 30 days)
• [ ] Approve contingency budget (typically +15%)

Project Governance

• [ ] Define risks & decision framework
• [ ] Create risk register (top risks: data quality, integration delay, performance regression)
• [ ] Define escalation path (who approves scope changes?)
• [ ] Set decision-making cadence (weekly? bi-weekly?)
• [ ] Document success criteria for each phase
• [ ] Plan for kill-switch/rollback scenarios

Environment Setup Phase (Weeks 3-5)

Infrastructure & DevOps

• [ ] Production infrastructure
• [ ] Provision production environment (separate from current Luma/legacy)
• [ ] Database: Set up read replicas for analytics/reporting
• [ ] Configure Elasticsearch/OpenSearch for product search
• [ ] Set up Redis for caching (session, FPC, rate-limiting)
• [ ] Configure Varnish or equivalent caching layer

• [ ] Set up CDN for static assets (Cloudflare, Fastly)

• [ ] Staging environment

• [ ] Clone production database to staging
• [ ] Set up equivalent Redis/Elasticsearch in staging
• [ ] Configure staging DNS (staging.yourdomain.com)
• [ ] Enable staging HTTPS with self-signed or staging SSL cert

• [ ] Verify performance baseline in staging matches production

• [ ] Development environment

• [ ] Docker setup or equivalent (standardized dev environment)
• [ ] Local database with anonymized production data
• [ ] Local Elasticsearch (single-node is fine)
• [ ] Xdebug configuration for PHP debugging

• [ ] Pre-commit hooks (code standards, security checks)

• [ ] CI/CD Pipeline

• [ ] Set up Git repository (GitHub, GitLab, Bitbucket)
• [ ] Configure branch strategy (develop, staging, main/production)
• [ ] Build pipeline: Composer install → PHP lint → Unit tests → Deploy to staging
• [ ] Deployment pipeline: Tag → Build → Deploy to production
• [ ] Set up rollback mechanism (last 3 releases available)
• [ ] Automated backup before each production deployment

Hyvä Installation & Configuration

• [ ] Hyvä theme setup
• [ ] Download Hyvä (license keys configured)
• [ ] Install via Composer: composer require hyva-themes/magento2-default-theme
• [ ] Run bin/magento setup:upgrade
• [ ] Set Hyvä as active theme in Admin

• [ ] Clear caches: bin/magento cache:clean

• [ ] Core Hyvä configuration

• [ ] Configure store views (languages, currencies if multi-regional)
• [ ] Set up Tailwind CSS build (npm install in theme directory)
• [ ] Configure Tailwind purge list (exclude custom classes)
• [ ] Set up image optimization (WebP format, responsive images)

• [ ] Configure PWA (service worker, offline experience)

• [ ] Magento 2 core settings

• [ ] Configure Magento security settings (Admin URL, 2FA)
• [ ] Set up GraphQL endpoint (/graphql)
• [ ] Enable REST API (if using for front-end)
• [ ] Configure CORS headers (if cross-origin requests needed)

• [ ] Set up API rate limiting (prevent abuse)

• [ ] Inventory & warehouse configuration

• [ ] Create Magento inventory sources for each warehouse
• [ ] Assign each source a warehouse location (name, address, phone)
• [ ] Configure stock levels per source
• [ ] Set up inventory reservation behavior
• [ ] Configure backorder handling
• [ ] Map fulfillment priority (which warehouse ships which regions?)

API & Integration Scaffolding

• [ ] Warehouse inventory API endpoint
• [ ] Create custom REST endpoint: /rest/V1/inventory/warehouse/availability
• [ ] Input: SKU + location filter
• [ ] Output: JSON with qty_available, qty_reserved, expected_restocking_date
• [ ] Implement caching (30-60 second TTL)
• [ ] Test with real warehouse system

• [ ] Document API specification for front-end team

• [ ] Fulfillment webhook receiver

• [ ] Create endpoint: /rest/V1/webhooks/fulfillment/update
• [ ] Accepts fulfillment status updates from WMS/3PL
• [ ] Updates Magento order status
• [ ] Triggers customer notifications
• [ ] Implement retry logic (webhook might fail first attempt)

• [ ] Log all incoming webhooks for debugging

• [ ] Payment processor integration

• [ ] Configure payment module for Stripe/Adyen/etc.
• [ ] Test payment flow: add to cart → checkout → pay → confirm
• [ ] Verify webhook handling (payment confirmed → order created)
• [ ] Set up PCI compliance (tokenized payments, no card storage)

• [ ] Document payment flow for QA

• [ ] Third-party integrations scaffolding

• [ ] Tax calculation API (mock or live)
• [ ] Shipping rate API (EasyPost, Fedex, etc.)
• [ ] Search engine sync (product feed to Elasticsearch or Algolia)
• [ ] Analytics tracking (Google Analytics 4 tagging)
• [ ] Email/SMS notification service (SendGrid, Twilio)

Custom Development Phase (Weeks 6-10)

Storefront Templates & Components

• [ ] Home page
• [ ] Hero section (banners, video, CTA)
• [ ] Product carousels (featured, best-sellers, new arrivals)
• [ ] Category grid or menu
• [ ] Trust signals (reviews, testimonials, certifications)
• [ ] Newsletter signup

• [ ] Test on mobile, tablet, desktop

• [ ] Product detail page

• [ ] Product title, description, images (gallery with zoom)
• [ ] Pricing display (with rule-based pricing if applicable)
• [ ] Inventory display per warehouse (location-based)
• [ ] SKU variants (size, color, etc.) with variant switching
• [ ] Add to cart button with quantity selector
• [ ] Related/upsell products
• [ ] Reviews and ratings section
• [ ] Warehouse location picker (optional: show nearest warehouse to customer)

• [ ] Stock status indicators (In stock, Coming soon, Backorder)

• [ ] Category/listing pages

• [ ] Product grid/list toggle
• [ ] Faceted filters (by category, price, brand, attributes)
• [ ] Sorting (by relevance, price, newest, rating)
• [ ] Pagination or infinite scroll
• [ ] Active filter display (show selected filters, easy removal)
• [ ] Search integration (if using external search engine)

• [ ] Mobile-optimized layout

• [ ] Shopping cart

• [ ] Product list with images, SKU, quantity
• [ ] Per-item pricing with applicable discounts
• [ ] Quantity adjustment
• [ ] Remove item functionality
• [ ] Cart subtotal, tax estimate, shipping estimate
• [ ] Promo code input
• [ ] Proceed to checkout CTA

• [ ] Mini-cart for header/sidebar

• [ ] Checkout flow

• [ ] Step 1: Shipping address (guest or login)
• [ ] Step 2: Shipping method (calculate based on warehouse + address)
• [ ] Step 3: Billing address (same as shipping or different)
• [ ] Step 4: Payment method (Stripe, Adyen, PayPal, etc.)
• [ ] Order summary (products, pricing, totals)
• [ ] Order confirmation page

• [ ] Test checkout with various scenarios (single warehouse, multi-warehouse SKUs, split shipments)

• [ ] Account pages

• [ ] Login/register
• [ ] Profile (name, email, phone)
• [ ] Addresses (shipping + billing)
• [ ] Order history (list view with status)
• [ ] Order detail (single order view, tracking info)
• [ ] Wishlist (if applicable)
• [ ] Password reset
• [ ] Logout

Warehouse-Specific Features

• [ ] Warehouse inventory display
• [ ] Real-time stock per warehouse on product page
• [ ] Warehouse location name and phone
• [ ] Estimated delivery date per warehouse
• [ ] Warehouse availability map (if multi-regional)
• [ ] API integration: fetch from /rest/V1/inventory/warehouse/availability

• [ ] Cache layer: 60-second TTL to prevent API overload

• [ ] Fulfillment logic

• [ ] Warehouse selection algorithm (which warehouse ships order?)
• [ ] Split shipments (if SKU only available in warehouse B but customer in warehouse A territory, handle gracefully)
• [ ] Backorder handling (customer can order out-of-stock item?)
• [ ] Estimated delivery display (based on warehouse distance to customer)

• [ ] Shipping method filtering (only show carriers available from selected warehouse)

• [ ] Inventory sync mechanism

• [ ] Scheduled job: Every 5 minutes, sync warehouse inventory to Magento
• [ ] OR: Webhook listener for real-time updates from WMS
• [ ] Reserve logic: Customer reserves inventory at checkout; WMS honors reserve until order fulfills

• [ ] Handle sync failures gracefully (if WMS is down, what happens to stock display?)

• [ ] Order status workflow

• [ ] Order placed → Warehouse receives order
• [ ] Warehouse fulfills → Updates Magento order status (Processing)
• [ ] Warehouse ships → Updates Magento order status (Shipped) + sends tracking
• [ ] Customer receives → Updates order status (Delivered)
• [ ] Handle returns/RMA if applicable

Performance Optimization

• [ ] Frontend performance
• [ ] Implement image optimization (WebP format, responsive srcset)
• [ ] Code splitting: JS modules load on-demand (lazy loading)
• [ ] CSS: Tailwind production build (purge unused classes)
• [ ] Minify JS/CSS
• [ ] Defer non-critical JS (analytics, third-party scripts)

• [ ] Target: LCP <1.5s, FCP <1.0s, CLS <0.1

• [ ] API performance

• [ ] GraphQL query optimization (fetch only needed fields)
• [ ] REST API pagination (prevent huge responses)
• [ ] Caching: Redis for inventory, product data
• [ ] Database query optimization (N+1 query audits)

• [ ] Target: API response time <200ms P95

• [ ] Database performance

• [ ] Analyze slow queries (MySQL slow query log)
• [ ] Add indexes on frequently filtered columns
• [ ] Archive old data (orders >2 years old can move to archive table)
• [ ] Monitor table sizes (product catalog growth)

Integration & Testing Phase (Weeks 11-13)

Warehouse System Integration

• [ ] WMS/Fulfillment system connection
• [ ] Test inventory sync: update WMS → verify in Magento within 60 seconds
• [ ] Test order push: new order in Magento → appears in WMS within 2 minutes
• [ ] Test fulfillment webhook: WMS marks item shipped → Magento reflects status + customer notified
• [ ] Test error scenarios: WMS down → graceful error handling

• [ ] Load test: 1000 concurrent inventory checks → system doesn’t break

• [ ] Fulfillment logic validation

• [ ] Test single-warehouse order (all items from warehouse A)
• [ ] Test split shipment (SKU from warehouse A, SKU from warehouse B)
• [ ] Test backorder scenario (item out of stock, customer backorders)
• [ ] Test warehouse priority (is nearest warehouse selected?)

• [ ] Test zone-based fulfillment (West Coast orders from West warehouse)

• [ ] Payment processor testing

• [ ] Successful charge (test card number, verify in processor dashboard)
• [ ] Declined card (processor denies, customer sees error)
• [ ] 3D Secure (if applicable, test 2FA flow)
• [ ] Refund flow (admin refunds order, verify in processor)
• [ ] Partial refund (refund one line item, not whole order)

• [ ] Duplicate payment detection (prevent double-charges)

• [ ] Third-party integrations

• [ ] Tax calculation (order total = subtotal + tax?)
• [ ] Shipping rates (EasyPost returns correct rate for address?)
• [ ] Email notifications (customer receives confirmation email?)
• [ ] Analytics tracking (GA4 receives order confirmation event?)

Quality Assurance

• [ ] Functional testing
• [ ] Happy path: Browse → Add to cart → Checkout → Pay → Confirmation (test 20+ times on various devices)
• [ ] Edge cases: Empty cart, out-of-stock items, decimal pricing, promotional discounts
• [ ] Error handling: Network failure during checkout, payment failure, inventory race condition

• [ ] Cross-browser testing (Chrome, Safari, Firefox, Edge on desktop + mobile)

• [ ] Performance testing

• [ ] Load test: Simulate 1000 concurrent users browsing
• [ ] Stress test: 5000 concurrent users (identify breaking point)
• [ ] Spike test: Normal traffic → 10x spike (how does system recover?)
• [ ] Endurance test: Run at 80% capacity for 24 hours (identify memory leaks)

• [ ] Soak test: Run at normal capacity for 72 hours (identify subtle degradation)

• [ ] Security testing

• [ ] SQL injection (try ‘ OR ‘1’=’1 in search field, verify parameterized queries)
• [ ] XSS (insert “ in product reviews, verify sanitization)
• [ ] CSRF (test form submissions without CSRF tokens)
• [ ] Authentication bypass (try to access /customer/account without login)
• [ ] Authorization (logged-in user A can’t view user B’s orders)

• [ ] PCI compliance scan (no credit card numbers in logs, network traffic)

• [ ] Accessibility testing

• [ ] Keyboard navigation (tab through all interactive elements)
• [ ] Screen reader compatibility (product pages readable by NVDA/JAWS)
• [ ] Color contrast (WCAG AA standard: 4.5:1 for text)
• [ ] Form labels (all inputs have associated <label>)

• [ ] Alt text (all images have meaningful alt attributes)

• [ ] SEO validation

• [ ] Metadata: Title, description, canonical URLs present
• [ ] Structured data: Product, FAQPage, BreadcrumbList JSON-LD
• [ ] Sitemaps: XML sitemaps generated and valid
• [ ] Robots.txt: Configured, not blocking crawlable pages
• [ ] Mobile-friendly test (Google Mobile-Friendly Test)
• [ ] Core Web Vitals: LCP, FCP, CLS meet targets

Data Migration Validation

• [ ] Data quality checks
• [ ] Product count: Compare legacy → Hyvä (should match)
• [ ] SKU accuracy: Spot-check 50 random SKUs (prices, descriptions match?)
• [ ] Image migrations: All product images display correctly
• [ ] Customer data: Historical orders accessible, not corrupted

• [ ] Pricing rules: Catalog/cart rules apply correctly

• [ ] Parallel operation validation

• [ ] Orders placed in Magento appear in legacy system within 5 minutes (if legacy is still primary)
• [ ] Inventory changes in WMS reflect in both systems
• [ ] Customer data consistency (no divergence between systems)

Go-Live & Cutover Phase (Weeks 14-16)

Pre-Go-Live Checklist

• [ ] 24 hours before cutover
• [ ] Final database backup of production
• [ ] Final backup of legacy system (full file + database)
• [ ] Verify staging environment is 100% identical to production
• [ ] Confirm all integrations working in staging
• [ ] Brief all stakeholders (CTO, CIO, customer service, fulfillment team)

• [ ] Confirm incident response team available during cutover window

• [ ] Communication plan

• [ ] Customer-facing status page (communicate downtime window)
• [ ] Internal Slack channel for real-time updates
• [ ] Customer support brief (if issues arise, what do we tell customers?)

• [ ] Executive summary of cutover plan (timeline, risks, rollback)

• [ ] Rollback plan

• [ ] Document rollback procedure (if go-live goes sideways, here’s how we revert)
• [ ] Test rollback in staging (confirm it actually works)
• [ ] Confirm DNS rollback (can revert to legacy system quickly?)
• [ ] Estimated rollback time: 30 minutes total downtime

Cutover Execution

• [ ] Week 14 (Cutover window, 2am-8am recommended)
• [ ] [ T-60min ] Final backup of production systems
• [ ] [ T-45min ] Announce maintenance window (status page + email)
• [ ] [ T-30min ] Final health check: staging environment fully validated
• [ ] [ T-15min ] Database final sync (if using legacy → new data migration)
• [ ] [ T-0min ] DNS switch: Route traffic from legacy IP to Hyvä IP
• [ ] [ T+10min ] Monitor error logs, customer support channels
• [ ] [ T+30min ] Smoke test: Browse homepage, add to cart, checkout (can’t all be 100% perfect yet)
• [ ] [ T+60min ] Open traffic at 5% (monitor closely)
• [ ] [ T+120min ] Increase to 25% if no major incidents
• [ ] [ T+180min ] Increase to 50% if stable
• [ ] [ T+240min ] Increase to 100% if no issues

• [ ] [ T+360min ] Status page shows “back to normal”

• [ ] Cutover team structure

• [ ] Incident Commander (makes final decisions)
• [ ] Technical Lead (monitors systems, coordinates fixes)
• [ ] Database Admin (stands by for data issues)
• [ ] Bemeir’s Principal Engineer (on-call for Hyvä-specific issues)
• [ ] Customer Success (monitors support tickets, escalates urgent issues)

Post-Go-Live Stabilization (Weeks 15-16)

• [ ] Weeks 15-16: Monitor, stabilize, embed knowledge
• [ ] Run at 100% traffic for 72 hours, monitor continuously
• [ ] Bemeir embeds 1-2 senior engineers on-site or remote (30 days)
• [ ] Your team shadows engineers on first 20 feature tickets
• [ ] Document operational procedures (how to deploy? how to debug? escalation?)

• [ ] Conduct postmortem (what went well? what would we do differently?)

• [ ] Keep legacy system running (60-90 days post-cutover)

• [ ] Don’t decommission legacy system yet
• [ ] Keep in archive mode (read-only), accessible if needed

• [ ] Use for reference/validation during first quarter on Hyvä

• [ ] Customer communication

• [ ] Email all customers: “We’ve upgraded our platform for better performance”
• [ ] Monitor feedback (use UserTesting, survey, NPS)

• [ ] Address any negative feedback (performance issues, UI confusion)

• [ ] Analytics & success metrics

• [ ] Compare new vs. old metrics (LCP, conversion rate, order volume)
• [ ] Analyze customer feedback (were page loads noticeably faster?)
• [ ] Document wins (feature velocity improved? team happier?)
• [ ] Celebrate with team (you shipped this!)

Post-Go-Live Operations (Ongoing)

Monitoring & Maintenance

• [ ] Weekly
• [ ] Review error logs (Sentry, New Relic, or equivalent)
• [ ] Check Core Web Vitals (Google Search Console)
• [ ] Monitor API latency (inventory sync, payments, etc.)

• [ ] Review customer support tickets for patterns

• [ ] Monthly

• [ ] Hyvä security updates (apply patches)
• [ ] Magento security updates (separate from Hyvä)
• [ ] Database optimization (vacuum, index review)
• [ ] Dependency updates (Composer, npm)

• [ ] Cost review (CDN, hosting, third-party services)

• [ ] Quarterly

• [ ] Feature planning (next 12 weeks of development)
• [ ] Performance review (can we make it faster?)
• [ ] Security audit (penetration test, vulnerability scan)
• [ ] Team retrospective (what’s working? what’s hard?)

Team Knowledge Transfer

• [ ] Day 1-7 (Bemeir embedded engineer present)
• [ ] Codebase tour (directory structure, key files)
• [ ] Local development setup (Docker, database, running locally)
• [ ] Deployment process (how code gets to production)

• [ ] Debugging workflow (xdebug, error logs, monitoring)

• [ ] Week 2-4

• [ ] First customer feature ticket (pair with engineer)
• [ ] Second feature ticket (less hand-holding)
• [ ] Database schema review (how data is organized)

• [ ] API integration patterns (how to build new endpoints)

• [ ] Week 5-12

• [ ] Team leads new features independently
• [ ] Embedded engineer reviews PRs, provides feedback
• [ ] Document standard procedures (coding standards, PR template)
• [ ] Gradual engineer withdrawal (less present, more on-call)

Success Metrics to Track

Before checking these boxes, define what success looks like: