The full program needs 40 weeks against ~38 weeks of runway — PI 4 lands late.
↑ end Feb 2027 deadline falls inside PI 4
4 sprints + a short IP each. 4 × 9 = 36 wks — fits with slack, costs ~1 build sprint per PI.
Hold 10-week PIs; defer mobile or non-critical web to a release after Feb 2027.
Keep scope & cadence; the only lever that doesn't cut delivery capacity.