The short answer
Astra designs your PTO policy by benchmarking your peers, modeling the cost and behavioral impact of each option, and drafting the final language. She asks 4 calibration questions (headcount, jurisdictions, current policy if any, founder bias toward unlimited vs fixed), benchmarks 15-20 comparable companies via public sources (handbooks, careers pages, Glassdoor), models 3 options for your team — fixed accrual, unlimited, hybrid (fixed minimum) — with cost, average days taken, burnout signals, and admin overhead per option, recommends one with reasoning, and drafts the policy language plus an internal rollout doc explaining the decision to your team. Most teams that use this avoid the "unlimited PTO = nobody takes time" trap and ship a policy that actually gets used.