Record: Room, stage, date and time, three readings with positions, decision, expectation, disproof line.
Pick the next transition due in any room and name it on paper.
Measure at three places in the room, including the coolest end.
Describe what the compost or casing looks like in each place.
Write the decision, the schedule chosen and what you expect in 72 hours.
Add one line naming the observation that would prove you wrong.