Ask what each date means
A contractor schedule may show start dates, completion dates, delivery windows or inspection milestones. Clarify which dates are firm commitments, which are estimates and what assumptions they depend on.
Weather, permits, hidden conditions, owner decisions, material availability and subcontractor sequencing can affect different projects in different ways. The contract and project-specific communication are more authoritative than a generic online timeline.
Understand owner dependencies
Selections, access, moving belongings, payment milestones or approvals may need to occur before work can continue. Put those owner actions on the same schedule so they are not invisible dependencies.
If work is regulated, confirm the responsible party for permits, inspections and code compliance. Do not compress required inspection or safety steps merely to recover a late schedule.
Handle changes explicitly
A scope change can add work and alter dependencies. Record the effect on cost and time rather than expecting the original finish date to remain valid automatically.