{"type":"excalidraw","version":2,"source":"https://AwesomeSystemDesign.dev","elements":[{"angle":0,"strokeColor":"#628572","backgroundColor":"#edf5ee","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-1"],"frameId":null,"roundness":null,"boundElements":[{"type":"text","id":"shape-1"}],"updated":0,"link":null,"locked":false,"id":"shape-0","type":"rectangle","seed":41,"x":30,"y":30,"width":420,"height":68,"customData":{"revealStep":1}},{"angle":0,"strokeColor":"#394557","backgroundColor":"transparent","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-1"],"frameId":null,"roundness":null,"boundElements":null,"updated":0,"link":null,"locked":false,"id":"shape-1","type":"text","seed":114,"x":50,"y":52.3,"width":380,"height":23.400000000000002,"fontSize":18,"fontFamily":1,"text":"Service Level Objectives (SLOs)","originalText":"Service Level Objectives 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(Service Level Objective):\n\"What target do we set for the SLI?\"\nExample: 99.9% of requests successful in any 30-day window","originalText":"SLO (Service Level Objective):\n\"What target do we set for the SLI?\"\nExample: 99.9% of requests successful in any 30-day 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Budget:\nbudget = 1 - SLO = 0.1% (in 30 days)\n= 0.001 × 30 × 24 × 60 = 43.2 minutes of allowable errors","originalText":"Error Budget:\nbudget = 1 - SLO = 0.1% (in 30 days)\n= 0.001 × 30 × 24 × 60 = 43.2 minutes of allowable 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Rate Alert:\n\"How fast are we consuming our error budget?\"","originalText":"Burn Rate Alert:\n\"How fast are we consuming our error 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= actual_error_rate / budget_error_rate","originalText":"burn_rate = actual_error_rate / 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= 1.0 → consuming budget at exactly planned rate\nburn_rate = 10.0 → consuming budget 10× faster than planned\n→ Budget exhausted in 3 days instead of 30\n→ ALERT immediately","originalText":"burn_rate = 1.0 → consuming budget at exactly planned rate\nburn_rate = 10.0 → consuming budget 10× faster than planned\n→ Budget exhausted in 3 days instead of 30\n→ ALERT immediately","textAlign":"left","verticalAlign":"middle","containerId":"shape-12","lineHeight":1.3,"autoResize":false,"customData":{"revealStep":7}},{"angle":0,"strokeColor":"#6577aa","backgroundColor":"#eef1fc","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-8"],"frameId":null,"roundness":null,"boundElements":[{"type":"text","id":"shape-15"}],"updated":0,"link":null,"locked":false,"id":"shape-14","type":"rectangle","seed":1063,"x":30,"y":871.9999999999999,"width":572.2556800000001,"height":106.2,"customData":{"revealStep":8}},{"angle":0,"strokeColor":"#394557","backgroundColor":"transparent","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-8"],"frameId":null,"roundness":null,"boundElements":null,"updated":0,"link":null,"locked":false,"id":"shape-15","type":"text","seed":1136,"x":50,"y":889.9999999999999,"width":532.2556800000001,"height":70.2,"fontSize":18,"fontFamily":1,"text":"Multi-window alerting (Google SRE Book approach):\nFast burn: burn_rate > 14.4 over 1h AND > 14.4 over 5m\n→ 2% of budget consumed in 1 hour → page immediately","originalText":"Multi-window alerting (Google SRE Book approach):\nFast burn: burn_rate > 14.4 over 1h AND > 14.4 over 5m\n→ 2% of budget consumed in 1 hour → page 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burn: burn_rate > 1.0 over 3d AND > 1.0 over 6h\n→ Budget being steadily eroded → ticket (not page)","originalText":"Slow burn: burn_rate > 1.0 over 3d AND > 1.0 over 6h\n→ Budget being steadily eroded → ticket (not page)","textAlign":"left","verticalAlign":"middle","containerId":"shape-16","lineHeight":1.3,"autoResize":false,"customData":{"revealStep":9}},{"angle":0,"strokeColor":"#a68a53","backgroundColor":"#fff7e6","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-10"],"frameId":null,"roundness":null,"boundElements":[{"type":"text","id":"shape-19"}],"updated":0,"link":null,"locked":false,"id":"shape-18","type":"rectangle","seed":1355,"x":30,"y":1110.9999999999998,"width":600.7802800000001,"height":153,"customData":{"revealStep":10}},{"angle":0,"strokeColor":"#394557","backgroundColor":"transparent","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-10"],"frameId":null,"roundness":null,"boundElements":null,"updated":0,"link":null,"locked":false,"id":"shape-19","type":"text","seed":1428,"x":50,"y":1128.9999999999998,"width":560.7802800000001,"height":117,"fontSize":18,"fontFamily":1,"text":"Implementation:\n• SLI computed as a time-series (rolling success rate)\n• Error budget tracked as a time-series (remaining minutes)\n• Burn rate computed as a derived metric\n• Dashboard: error budget remaining, burn rate trend","originalText":"Implementation:\n• SLI computed as a time-series (rolling success rate)\n• Error budget tracked as a time-series (remaining minutes)\n• Burn rate computed as a derived metric\n• Dashboard: error budget remaining, burn rate trend","textAlign":"left","verticalAlign":"middle","containerId":"shape-18","lineHeight":1.3,"autoResize":false,"customData":{"revealStep":10}}],"appState":{"viewBackgroundColor":"#fbfbf8","gridSize":null},"files":{}}