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2 RELIABILITY IS THE MOST IMPORTANT THING DORA Report

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3 WE BUILD SOFTWARE FOR USERS And we measure success with velocity

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4 THE WORLD IS A MESSY PLACE Every time we deploy a feature, we borrow reliability to invest in the future

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5 WHAT DO YOU EXPECT FROM APPLICATIONS

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6 RELIABILITY • Meets targets ⇒ happy customers • Sad customers ⇒ misses targets

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7 ERROR BUDGET BURN RATE • When to act • When to “invest” • How to measure impact

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8 DATA DRIVEN DECISIONS With an error budget

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9 WHAT CAN WE SPEND THE BUDGET ON • Releasing new features • Expected system changes • Inevitable failure in hardware, networks, etc. • Planned downtime • Risky experiments

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10 MAKE YOUR USERS HAPPY