--- title: "Humans are always the hardest part: The one thing in…" url: https://daily.dev/posts/humans-are-always-the-hardest-part-the-one-thing-in--skxrr67nn source_url: https://timefold.ai/blog/humans-are-always-the-hardest-part-the-one-thing-in-optimization-you-cant-debug type: article source: "Timefold" published: 2026-03-31T12:27:51.308Z updated: 2026-03-31T12:39:12.894Z reading_time: 3 upvotes: 0 comments: 0 language: 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. # Humans are always the hardest part: The one thing in… **[Timefold](https://daily.dev/sources/timefold-blog)** · 3 min read · 0 upvotes · 0 comments ## Summary Optimization projects rarely fail because of math — they fail because of people. Cognitive biases like status quo bias, planning fallacy, sunk cost fallacy, and the well-travelled road effect cause stakeholders to resist better plans, underestimate effort, and cling to familiar but inferior workflows. Even when an optimized plan is objectively superior, humans focus on the few changes rather than the many improvements. The real constraints in planning projects are psychological: fear of change, overconfidence in familiar processes, emotional attachment to past investments, and unrealistic timelines. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Why rational humans make irrational decisions](https://daily.dev/posts/why-rational-humans-make-irrational-decisions-drrm1qgnw) · The Art of Simplicity · 2 upvotes · 1 comments --- [View this post on daily.dev](https://daily.dev/posts/humans-are-always-the-hardest-part-the-one-thing-in--skxrr67nn)