Which UX Metric Model Should You Choose? A Deep Dive into UES, HEART, PULSE, PTECH and GSM

User experience (UX) is the subjective perception of users before, during, and after using a product, covering emotions, beliefs, preferences, cognitive impressions, physiological and psychological responses, behaviors, and achievements.

Because UX is subjective, it is hard to measure, but quantifying it is essential for management, as Peter Drucker said, “If you can’t measure it, you can’t manage it.”

What Is UX Measurement?

UX measurement is a method and data system for evaluating UX, turning subjective experiences into observable, quantifiable numbers. A scientific measurement system should be measurable, quantifiable, reliable, and sustainable.

Industry UX Measurement Models

1. UES Model (User Experience System)

Developed by Alibaba Cloud Design Center, UES includes three parts: a five‑dimensional measurement model, an experience‑issue management mechanism from discovery to closure, and a set of usability testing and digital‑management tools.

The five dimensions are:

Ease of Use : learning, operation, and clarity.

Consistency : uniformity across products in style, framework, and components.

Happiness : satisfaction, NPS, visual perception, usability perception.

Task Success : task completion rate and time.

Performance : metrics such as First Meaningful Paint, request latency, and other response‑time indicators.

2. PULSE Model

PULSE (Page view, Uptime, Latency, Seven‑day active users, Earning) is a traditional website metric framework focusing on technical performance, user loyalty, and revenue, but it does not directly capture user experience.

Page View (PV): total, daily, weekly page views.

Uptime: continuous stable operation time.

Latency: network delay affecting perceived speed.

Seven‑day active users (UV): number of users active within a week.

Earning: revenue models varying by site type.

3. HEART Model

Created by Google’s Kerry Rodden, HEART measures Happiness, Engagement, Adoption, Retention, and Task Success. It is widely used inside Google and shared through papers and blogs.

Happiness : satisfaction, NPS, visual and usability perception.

Engagement : depth of user interaction (frequency, intensity, duration).

Adoption : how many new users start using the product.

Retention : proportion of users who continue using the product over time.

Task Success : efficiency, effectiveness, error rate.

4. PTECH Model

Ant Design’s adaptation of HEART for enterprise products, adding Clarity as a dimension. Its five dimensions are Performance, Task Success, Engagement, Clarity, and Happiness.

5. GSM Model

Google’s Goals‑Signals‑Metrics framework: Goals define what problems to solve; Signals are observable phenomena after achieving goals; Metrics quantify those signals.

Goals : business, user, and design objectives.

Signals : behavioral or attitudinal changes indicating goal achievement.

Metrics : measurable data derived from signals.

By selecting appropriate dimensions and indicators from these models, product teams can systematically assess and improve user experience, turning subjective feelings into actionable data.