Ask only what changes the decision.

Ask for an answer only when it changes the estimate or a necessary next action.

Do not treat an unknown answer as a valid zero simply to let the form continue.

The same number means different work when the unit changes; keep the unit attached throughout the journey.

Reject or explain out-of-range values; do not quietly clamp a visitor’s request into a cheaper job.

Ask the branch-defining questions early, then calculate from the final relevant answers.

A range should come from stated uncertain inputs, not an arbitrary confidence-looking percentage.

An honest manual-review path is better than a precise estimate for work the model cannot understand.

Separate the value of the estimate from permission to contact someone; explain any required handoff.

A syntactically valid answer can still be inaccurate; do not confuse format checks with identity or suitability.