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The third principle is early testing saves time and money, which is essentially the scientific basis for shift-left. A defect caught in the requirements phase might cost you an hour to fix. The same defect caught in production might cost ten times that — rework, hotfixes, customer support, reputati…

The third principle is early testing saves time and money, which is essentially the scientific basis for shift-left. A defect caught in the requirements phase might cost you an hour to fix. The same defect caught in production might cost ten times that — rework, hotfixes, customer support, reputation damage.