Customer Effort Score (CES): Measure Task Friction
Customer Effort Score (CES) measures how much work a customer expends to complete a task. It answers 'How easy was it?' right after a support interaction, purchase, or onboarding.
Why it exists
Businesses need to know where friction exists in their customer journey. While overall satisfaction is important, it doesn't pinpoint why a customer might be frustrated. CES was created to isolate and measure the effort required for specific, transactional tasks, as high effort is a strong predictor of churn.
The mental model
Think of CES as a "friction meter" for a single task. Instead of asking "Do you like us?", it asks "Was that specific thing we just did together easy or hard?". It's focused on the process, not the overall relationship. A low score (indicating high effort) means you're making customers work too hard to get value.
How it works
CES is measured with a simple, direct survey immediately following a specific interaction. The survey asks a question like, "How easy was it to resolve your issue today?". Customers respond on a simple numerical scale, typically 1 to 5, where a lower number means higher effort and a higher number means lower effort. The results are then aggregated to track trends for specific touchpoints.
When to use it
Use CES to measure the efficiency of specific, goal-oriented processes. Three common places are: first, after a customer support interaction to gauge resolution efficiency; second, after a purchase to assess the buying process; and third, during user onboarding to see if new users can get started without difficulty.
When not to use it
Do not use CES to measure overall customer loyalty or satisfaction with your brand or product as a whole. It's a transactional metric, not a relational one. A customer might have an easy support experience but still be unhappy with the product that caused the issue in the first place. For overall sentiment, use metrics like Net Promoter Score (NPS) or Customer Satisfaction (CSAT).
One canonical example
A user contacts support because their billing statement is confusing. After the chat ends, an automated survey pops up: "On a scale of 1 (very difficult) to 5 (very easy), how easy was it to handle your request?". The user selects '2'. This low score is a direct signal that even if the agent solved the problem, the process itself was difficult. This feedback helps the company identify and fix friction points in their support or billing systems.
Interview question
Which statement best describes the unique focus of Customer Effort Score (CES) compared to other customer metrics?
- a.It quantifies the overall satisfaction a customer has with a brand.
- b.It assesses the ease or difficulty a customer experiences completing a specific task.Correct
- c.It tracks long-term customer loyalty and retention rates.
- d.It measures a customer's likelihood to recommend a product or service.
Why? this is the answer
CES is designed to measure the effort a customer expends on a specific, transactional task, acting as a 'friction meter' for that interaction. Unlike metrics such as Net Promoter Score (NPS) or Customer Satisfaction (CSAT), which gauge overall loyalty or general satisfaction, CES pinpoints friction in a particular process.
Just read this? Test yourself on what you have been reading.
Read the original → maze.co
- #ux research
- #product metrics
- #cx
- #ces
You just looked this up. Could you explain it out loud?
That is the part interviews actually test. Tezvyn takes questions like this one and gives you what the interviewer is really checking, the answer that lands, and the mistake that ends the conversation, in the four minutes before your next meeting.
The iPhone app is on the way
We are building it. Until it lands, nothing here is held back from you: every interview card, your saved cards, streaks and the job board all work in Safari, plus hundreds of free practice quizzes of thirty questions each. Sign in and it all carries over to the app the day it arrives.
Want it as an icon? Tap Share at the bottom of Safari, then Add to Home Screen. It opens full screen and the cards you have read stay available offline.
We are hiring for this. Open roles that interview on ux research — each one lists the topics its interview covers.
See open roles