How do you manage tight project delivery timelines in a team environment?

Situation: We had 6 weeks to deliver a new data mart for a product launch; initial estimate was 10 weeks. Task: Deliver without burning out the team or cutting corners on quality. Action: I ran a scope negotiation: defined mandatory vs. nice-to-have with the PM. We dropped 2 non-critical dimensions. I broke work into 2-week milestones with clear ownership. I used burndown charts and flagged slippage in daily standups. I protected focus time—reduced meetings by 40%. When we hit a blocker, I paired with the engineer for 2 hours to unblock. We implemented a 'Definition of Done' that included tests and docs. Result: Delivered in 5.5 weeks; we retrospected and improved our estimation for future projects.