Skip to content
Session 4 · Compare

Time Machine

Drag through eight weeks of construction. Compare weeks side by side, overlay them, or let the change map highlight what moved. Then record observations — with evidence — for your report.

What changed? Week 03 → Week 04

Target: 5 supported observations0 observation(s) recorded for these weeks

Compare the two weeks. For each change, click it and record OBSERVATION · LOCATION · EVIDENCE · INTERPRETATION · CONFIDENCE · VERIFY. Some changes are obvious; others need careful inspection.

Observation ✓
“A new rectangular concrete area is visible east of the existing foundation.”
Interpretation
“This may represent an additional foundation section.” — belongs in INTERPRETATION, with a confidence and a way to verify.
Week 1Week 4: Structural workWeek 8
Comparing against week 3
View
Layer
50%

Week 3: West half of the slab poured; east footings, rebar and forms in place; water standing in the east pit. → Week 4: Slab complete, Level 1 steel up, tower crane on site, steel staged west, new annex pad east of the building. (Summaries are ground truth for the demo only — in the field you won’t have them.)

Click the map to observe
Pick a spot where something changed. Record what you SEE first — interpretation comes second, and must be labelled as such.
Observations (0)
Build report →
    Warm-up

    Observation or interpretation?

    An observation is what the data shows. An interpretation is what you think it means. Reports need both — clearly separated.

    • “Asphalt covers the west half of the parking area in week 7; the east half is still gravel.”

    • “The roof deck will be finished next week.”

    • “The steel crew is ahead of schedule.”

    • “They must have used the stockpile for backfill.”

    • “The drainage design is bad.”

    • “The stockpile in grid G-1 is visibly smaller than in week 3.”

    • “Steel columns are visible across the full footprint in week 6; none were visible in week 4.”

    • “Standing water is visible in the southwest corner of the excavation.”