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CI/CD Improvement Scenario
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(First-order impacts only, assuming very rough CircleCI pricing)
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AssumptionsValueUnitNotes
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Number of Devs100developers
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PRs / Week / Dev3PR / week / dev
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Turns / PR3turns / PR
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Average Dev Salary$125,000.00$ / year
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CI $ / user / month$15.00$ / user / month
($15 / month over 3 users)
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CI misc credits / build200credits / build
(docker layer caching)
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CI credits / min20credits / min
(assuming CCI large)
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CI $ / credit$0.0006$ / credit
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CI $ / min$0.0120$ / min
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Calculated
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Merge Builds / Week300
merge builds / week
(assume every PR is merged)
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PR Builds / Week900
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Total Builds / Week1200
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Dev Salary / Minute$0.24$ / min
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CI User Cost / Week$339.23user fees
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CI Other Cost / Week$144.00other build fees
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Weekly CostsMinutes / Build
20 min baseline
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40302015105
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Variable Dev Costs$11,415.53$8,561.64$5,707.76$4,280.82$2,853.88$1,426.94
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Variable Build Costs$576.00$432.00$288.00$216.00$144.00$72.00
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Fixed Build Costs$483.23$483.23$483.23$483.23$483.23$483.23
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Total Weekly CI Cost$12,474.76$9,476.87$6,478.99$4,980.05$3,481.11$1,982.17
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CI Improvement Cost of Delay ($/week)
-$5,995.76-$2,997.88$0.00$1,498.94$2,997.88$4,496.82
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Annual Cost of Delay-$311,779.65-$155,889.83$0.00$77,944.91$155,889.83$233,834.74
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