Single Threaded Ownership Gets Things Done
Large, ambiguous projects stall not because they are technically impossible but because no single person owns the outcome end-to-end. Assigning one owner who can process ambiguity is the unlock.
"Do not let perfection be an enemy of progress. Going further, do not let future improvements you know you'll have to make stop you from moving on to the next thing." Mitchell Hashimoto
Will Larson observes that at terminal career levels, projects are always available but they fall into two categories: urgent with a fixed external deadline, or deeply ambiguous with every aspect unanchored. The second category is where most projects die. Data locality laws keep changing, expansion plans keep shifting, and it is impossible to make progress without simplifying assumptions that you know might be wrong. Most people cannot engage with problems where nothing is anchored. The rare person who can own this ambiguity is extraordinarily valuable.
Mitchell Hashimoto's approach to building large technical projects provides the practical methodology: decompose a large problem into smaller problems where each produces visible results, solve each sub-problem only well enough to progress toward a demo, then iterate. The critical insight is to prioritize visible forward progress over perfect sub-components. "My goal with the early sub-projects isn't to build a finished sub-component, it is to build a good enough sub-component so I can move on to the next thing on the path to a demo." This maintains energy and momentum through what would otherwise be a demoralizing multi-year slog.
Marc Brooker echoes this from the organizational side: when someone wants to make a major change at a big company, they need a clear statement of the problem, a clear statement of the solution, stakeholder buy-in, and the resilience to engage with doubters without being crushed. You will repeat, repeat, and repeat. The doubters will get you down. Writing everything down is the tool that keeps you sane and honest through this process.
Takeaway: Assign one person who can tolerate ambiguity to own the entire outcome, give them freedom to simplify aggressively, and let them iterate toward demos.
See also: The Heilmeier Catechism for Evaluating Ideas | Design Systems That Make Success Easy | Functional Institutions Are the Exception Not the Rule