Important timings:

Starting point to Day Room: ~15s Exit to Day Room, ~12s Left to Day Room

Day Room to Science Lab: ~18s Exit to Science Lab, ~16s Right to Science Lab

Science Lab to Courtyard: ~16s Exit to Courtyard, ~17s Straight to Courtyard

Locker Room to Women's Restroom: ~24s Left to Women's Restroom, ~18s Right to Women's Restroom

Courtyard to Day Room: ~11s West Door to Day Room, ~12s East Door to Day Room

Day Room to Class Room: ~20s Left to Class Room, ~22s Right to Class Room

Class Room to Locker Room: ~27s Left to Locker Room, ~14s Right to Locker Room

Locker Room to Iss Room: ~21s Left to Iss Room, ~17s Right to Iss Room

Taking a door takes 4s IGT.

Texts, typing codes, computer, cutscenes, pause do freeze IGT, meaning they do NOT count towards result screen's time.

This list is for important timings on avoiding the monster assuming optimal movement and stamina management.