Studio Playbook // Engineering & UX

From Heuristics to Code: The 4-Stage Product Design Process We Use

By Emily Hughes · 6 min read · Design Process & Architecture

Most small business owners have lived through the classic agency horror story: you pay £5,000 to £10,000, wait four months while junior account managers trade emails, and end up with a bloated WordPress theme stuffed with 42 plugins that takes 6 seconds to load on a smartphone.

The site looks pretty on a 27-inch iMac in the agency boardroom, but the moment a real customer visits on 4G, forms break, buttons disappear into hamburger menus, and conversion rates drop through the floor.

At EmRich Digital, we don't work like traditional agencies. With 10+ years in senior product management, we treat every client website or app like a live commercial software product. Here is the exact 4-stage process we run — from initial heuristic diagnostic through to hand-coded production.

STAGE 01 · 48-HOUR DIAGNOSTIC & AUDIT
Heuristic Funnel Evaluation

Before opening Figma or writing a single line of CSS, we stress-test your existing customer journeys against 10 core conversion heuristics: clarity above the fold, mobile thumb ergonomics, form friction gradients, and subconscious trust signals.

On a recent audit for a regional commercial cleaning firm, this stage uncovered that their testimonial slider was quoting Albert Einstein and their contact form had 12 required fields. Fixing those two leaks alone doubled mobile enquiries without redesigning the whole site.

STAGE 02 · DESIGN BOARDS & STRATEGY
Multi-Direction Visual Registers

Instead of forcing one subjective design on a client, we create structured design boards evaluating distinct visual and interactive directions.

For our Rare Antiquarian Bookseller project, we evaluated 7 distinct visual registers — from Archival Scholarly to Mayfair Salon. By testing 35 curated swatches and catalog layouts with real collectors, we arrived at "The Salon Ledger": a tactile hybrid combining historic serif authority with instant faceted filtering for 7,000+ rare volumes.

STAGE 03 · HAND-CODED ARCHITECTURE
Zero Bloat, High-Performance Engineering

We write clean, semantic HTML, modern CSS, and lightweight JavaScript. No drag-and-drop page builder overhead. No security-vulnerable plugin ecosystems.

For our Medical Aesthetics Clinic build, over 95% of visitors arrived via Instagram's in-app mobile browser. Instead of heavy desktop grids, we coded centered story highlight navigation and a 30-second treatment & price finder that pre-formats a direct WhatsApp booking. Page load speed: under 0.8 seconds on 4G.

STAGE 04 · LAUNCH & 12 MONTHS MAINTENANCE
No Hidden Agency Retainers

Every custom website and app build includes a full year of maintenance: security patching, uptime monitoring, WCAG compliance checks, and regular content tweaks.

Building a website shouldn't feel like buying a timeshare. When we build your product, you own it 100% — fast, clean, and built to convert.
Ready to build something exceptional?

Explore our custom builds and launch-phase pricing.

Websites from £800, custom apps from £1,500, and full redesigns from £600. Every build includes 12 months free maintenance.

View Studio Pricing → Explore Real Design Boards →