1. Tender Schedule

• Description:
  • This is a preliminary schedule prepared by the contractor for the client during the initial stages of the project, even before the project is awarded.
• Purpose:
  • To provide a high-level overview of how the contractor intends to execute the project, including the sequence and duration of major activities.
• Characteristics:
  • Summary Nature: Contains minimal details, focusing on key activities and their sequence.
  • Reference Document: Included in tender documents for the client’s reference and comparison with other bids.
• Example:
  • A contractor might outline a high-level sequence, such as site preparation, foundation work, structural framing, roofing, and finishing, with approximate durations for each phase.

2. Master Time Schedule

• Description:
  • The first comprehensive schedule issued by the contractor after the project is awarded.
• Purpose:
  • To provide a detailed plan for project execution, serving as a roadmap for all subsequent activities.
• Characteristics:
  • Detailed Plan: Includes more specifics than the tender schedule, covering major activities, durations, and sequences.
  • Budget and Cash Flow: May include budget costs, project cash flow projections, and resource histograms.
  • Submission Timeline: Typically submitted within approximately two weeks of the project award.
• Example:
  • A schedule showing detailed phases such as site preparation, foundation work, structural work, MEP installations, and finishing, along with associated costs and resource allocations.

3. Detailed Time Schedule

• Description:
  • A highly detailed schedule created as per the client’s specific requirements.
• Purpose:
  • To provide a granular plan that includes detailed breakdowns of activities, resources, and equipment.
• Characteristics:
  • Comprehensive Detail: Breaks down activities by floor, area, zone, and discipline of works.
  • Resource Allocation: Includes assigned budget costs, resources, and equipment for each activity.
  • Following Master Schedule: Developed after the master schedule, it further elaborates on the specifics.
• Example:
  • Instead of simply listing “install windows,” this schedule might include “measure window openings,” “cut frames,” “install frames,” and “seal windows,” each with specified resources and timelines.

4. Baseline Time Schedule

• Description:
  • The client-approved version of the detailed or master schedule.
• Purpose:
  • To serve as the official project timeline against which progress is measured.
• Characteristics:
  • Fixed Dates and Values: Once approved, the dates and values in this schedule are fixed and cannot be changed without formal approval.
  • Monitoring Tool: Used to track project progress and identify deviations.
• Example:
  • A schedule showing specific start and finish dates for all activities, approved by the client, serving as the benchmark for project performance.

5. Recovery Schedule

• Description:
  • A schedule developed to recover from delays and bring the project back on track.
• Purpose:
  • To realign the project timeline and ensure the contractual completion date is met despite delays.
• Characteristics:
  • Delay Mitigation: Addresses project delays and outlines actions to mitigate their impact.
  • Contractual Focus: Developed only when delays are within the contractor’s control.
• Example:
  • If weather delays foundation work by two weeks, a recovery schedule might adjust subsequent tasks to overlap or compress durations to regain lost time.

6. Revised Time Schedule

• Description:
  • A new version of the baseline schedule reflecting changes, delays, or new/omitted scope of work.
• Purpose:
  • To update the project timeline based on actual site conditions and changes in project scope.
• Characteristics:
  • Reflecting Changes: Incorporates modifications due to delays, scope changes, or other unforeseen events.
  • EOT Claims: Often associated with an Extension of Time (EOT) claim to justify delays not caused by the contractor.
  • Flexibility: May or may not include measures to recover delays, depending on the circumstances.
• Example:
  • If additional work is added to the project, a revised schedule would update the timeline to include the new tasks and adjust other activities accordingly.

Each type of schedule plays a crucial role in different phases of the construction project, ensuring that timelines are planned, monitored, and adjusted as needed for successful project completion.