Project managers depend on information provided by whom to effectively schedule their projects?

Project managers rely on information provided by subcontractors to effectively schedule their projects because subcontractors play a critical role in executing specific tasks and phases of the project. They possess specialized knowledge about their respective trades, which includes realistic timeframes for completing their work, understanding the sequencing of tasks, and identifying potential delays or challenges that could arise during the construction process.

This information is integral to the scheduling process, as it informs project managers on how to allocate resources efficiently, align deadlines, and ensure that the project progresses according to plan. Subcontractors' input can also help identify dependencies between different aspects of the project, allowing for a more cohesive and comprehensive schedule.

While clients, consultants, and suppliers do provide valuable insights and information, they primarily contribute to project specifications, overall strategies, and material provisions, respectively. Their roles are essential, but the specific, actionable scheduling information necessary for day-to-day operations within a project typically comes from subcontractors.