The X-Y-Z Formula

This structure forces you to move from vague to specific, from duty to impact. It gives the recruiter three things they need: the result, the proof, and the method.

Why Responsibilities Kill Applications

A job description already tells the recruiter what the role involves. If your CV simply mirrors the responsibilities list, you’ve given them no reason to prefer you over any other applicant. Responsibilities describe the role. Achievements describe you.

The difference between a candidate who gets interviews and one who doesn’t often comes down to this single distinction.

5 Before & After Examples Using X-Y-Z

1. Retail / Customer Service

Before: Responsible for managing customer complaints and resolving issues.

After: Reduced customer complaint resolution time by 40% (from 5 days to 3) by introducing a tiered escalation protocol adopted across all 4 store locations.

2. Tech / Software Engineering

Before: Worked on improving application performance and reducing load times.

After: Reduced API response time by 65% (from 1.4s to 0.5s) by refactoring the data-fetching layer and implementing Redis caching, resulting in a 12% improvement in user retention.

3. Healthcare

Before: Assisted with patient care and maintained medical records.

After: Improved ward documentation accuracy to 98.6% (from 91%) by introducing a double-check protocol during handovers, reducing medication errors by 23% over 6 months.

4. Marketing

Before: Managed social media accounts and created content for various platforms.

After: Grew LinkedIn organic reach by 180% in 6 months by implementing a thought leadership content calendar, generating 47 inbound leads worth £120K in pipeline.

5. Finance

Before: Responsible for budget management and cost reduction initiatives.

After: Identified and eliminated £280K in redundant vendor spend by auditing 3-year procurement data and renegotiating 12 supplier contracts, delivering 14% below budget for FY2024.

What to Do When You Can’t Find a Number

Not every achievement has a percentage or pound figure attached. Here are five types of quantification you may have overlooked:

• Time: How much faster, sooner, or more frequently? (“Reduced onboarding from 6 weeks to 3”)
• Scale: How large was the project, team, or budget? (“Managed £1.2M operational budget”)
• Frequency: How often, how many, how consistently? (“Delivered 24 client reports per quarter with zero missed deadlines”)
• Team size: How many people were involved? (“Led a team of 9 across 3 time zones”)
• Scope: How broad was the impact? (“Rolled out new CRM to 6 regional offices”)

How Many Achievement Bullets Per Role?

• Most recent role: 4-6 achievement bullets
• Roles within last 5 years: 3-4 bullets
• Older roles: 2-3 bullets or a single-line summary

Frequently Asked Questions

What is the X-Y-Z formula for CVs?

The X-Y-Z formula “Accomplished [X] as measured by [Y], by doing [Z]” is a structured approach to writing CV bullet points that focuses on achievement, measurable impact, and method rather than vague responsibilities. It was popularised by Google’s hiring team.

What if I can’t quantify my achievements?

Use relative or descriptive metrics: team size, project scope, time saved, frequency of tasks, or the scale of your responsibility. Estimates are acceptable if framed honestly (“approximately,” “circa”). Even “first to implement X in the department” is a valid achievement.

How many bullet points should each role have?

Most recent role: 4-6 bullets. Roles within the past 5 years: 3-4 bullets. Older positions: 2-3 bullets or omit entirely if not relevant. Quality over quantity every bullet should demonstrate clear value.