Feasibility and deadline are two different questions, and conflating them is how teams over-commit. Almost anything is possible; the real question is whether it is possible by a given date, with this team, given the constraints. A senior tech lead separates those explicitly and never gives a date for work they haven't sized.
| Question | What it really asks |
|---|---|
| Is it possible? | Can it be built at all? |
| Possible by date X? | With this team, scope, and constraints, by then? |
| What raises confidence? | Spikes, cut scope, more people, more time |
A confident "yes" that turns into a missed deadline costs far more than an honest "here's the range and the risks." Assessing feasibility well protects the team from death marches, gives the business real information to plan with, and builds the trust that lets your future estimates be believed.