--- title: Big Design Up Front Is Responsible Again · Los Techies description: AI has eliminated the two main costs that made Big Design Up Front (BDUF) impractical: writing specs and building software. With AI, a complete traceable spec... canonical: https://daily.dev/posts/big-design-up-front-is-responsible-again-los-techies-cntrcenlc twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Big Design Up Front Is Responsible Again · Los Techies | daily.dev og:description: AI has eliminated the two main costs that made Big Design Up Front (BDUF) impractical: writing specs and building software. With AI, a complete traceable spec... og:url: https://daily.dev/posts/big-design-up-front-is-responsible-again-los-techies-cntrcenlc og:image: https://api.daily.dev/og/posts/cNTrcENlC.png og:image:alt: Big Design Up Front Is Responsible Again · Los Techies og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Big Design Up Front Is Responsible Again · Los Techies **[LosTechies](https://daily.dev/sources/lostechies)** · 3 min read · 0 upvotes · 0 comments ## Summary AI has eliminated the two main costs that made Big Design Up Front (BDUF) impractical: writing specs and building software. With AI, a complete traceable spec — including stakeholder needs, architecture, and component-level tickets — can be produced in hours instead of weeks, then rendered into a narrated video walkthrough for customer review before any code is written. This isn't a return to waterfall because the design is now cheap to produce, change, and validate. The bottleneck has shifted from typing speed to human judgment. The proposed workflow: maintain a living spec with traceable levels, render each level into a review video for approval, compile the final design into tickets, then let the AI implement while verifying against the agreed spec. ## Full article daily.dev links to this article rather than hosting it. 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