What is the XYZ Formula? A Guide to Writing Success-Oriented Work Experience Bullets
By Umut Barış Terzioğlu · · Updated
The XYZ formula is a simple pattern for experience bullets: "Accomplished [X] as measured by [Y], by doing [Z]." It was popularised by Laszlo Bock while he led people operations at Google, and it has become standard CV advice because it fixes the most common weakness in experience sections: lines that describe duties instead of results.
What X, Y and Z stand for
- X, the result: what changed because of your work. A faster process, a launched product, a solved problem.
- Y, the measure: how anyone can tell. A number, a comparison, a scale or a time frame.
- Z, the method: what you actually did. The tool, approach or decision behind the result.
The Z part is where your skills appear in context. "By rebuilding the reporting pipeline in Python" says more than "Python" in a skills list, and it is the natural place for the terms a job ad asks for.
Before and after
| Duty-style line | XYZ line |
|---|---|
| Responsible for answering customer support emails. | Cut average first-response time from two days to six hours by setting up a triage queue with templates for the ten most common requests. |
| Worked on making the backend faster. | Roughly halved API response times at peak load by replacing repeated database reads with a Redis cache. |
| Managed the company's social media accounts. | Grew Instagram followers from 8,000 to 31,000 in twelve months by launching a weekly short-video series featuring customers. |
The order does not have to be X, Y, Z. Lead with whatever the target role cares about most: for a sales role that is usually the number, for an engineering role often the method.
How to write one in four steps
- Start from the duty. Take an existing line, for example "Managed supplier contracts."
- Ask "so what?" What was better because you did it? Lower costs, fewer delays, a smoother audit.
- Find the measure. Look for numbers you can stand behind: money, time, volume, error rate, number of people or customers.
- Name the method. Say specifically how: the negotiation, the tool, the process you changed.
The finished line might read: "Cut packaging costs by 12 percent across 40 supplier contracts by consolidating orders and renegotiating volume discounts."
When you do not have exact numbers
Many roles do not come with a dashboard. You still have measures:
- Scale: "for 14 branches", "a nine-person team", "a budget of 2 million euros".
- Frequency or volume: "weekly", "about 300 orders a month".
- Before and after: "from a manual spreadsheet to an automated report".
- Adoption or recognition: "adopted by three other teams", "chosen for the regional pilot".
Use honest approximations such as "about" or "more than", and never invent a figure: anything on your CV can come up in an interview. More ways to find measures are in how to quantify achievements on a CV.
Common mistakes
- Stacking metrics. Three numbers in one bullet blur the point. Pick the one that matters most.
- Overlong bullets. If a line runs past two rows, split it or shorten the method.
- Weak openings. "Helped with" and "was involved in" hide your role. Start with a verb that shows ownership; see action verbs for a CV.
- The same rhythm everywhere. Not every line needs all three parts. Use the full formula for your strongest results and keep smaller tasks short.
How this shows up in a CV check
The scoring on this site includes an Impact dimension worth 20 of the 100 points. It looks for quantified results and ownership verbs and counts against lines that read as responsibility filler, so XYZ-style bullets address what it measures directly. When a bullet has no measurable result yet, tailor mode rephrases it with a placeholder such as [X%] for you to replace with a real figure, rather than inventing one.