When I used to fly small planes there was a point half way down the runway that was the do or die point. At that point you had to make a decision to abort the takeoff or commit to make takeoff. The term liftoff or launch is often used in startup jargon. Most startups measure their runway in available time.
This type of time is calculated by dividing total cash by current “burn rate” for example if you’re burning $10,000 a month and have $100,000 in the bank – you got 10 months of runway left before liftoff must occur or what happens is called crash and burn. My suggestion is to improve this by tracking how many opportunities does the team have to verify that they are on course or off course. If they discover ways to work faster and smarter and get customer feedback sooner this cascading effect can magically extend thier runway. With monthly all staff check in’s, the team can decide need to pivot sooner then later. Remember a pivot is a change in strategy not a change in vision!