In Plain English
Quick Answer
A bar chart that shows project tasks as horizontal bars across a timeline, making the schedule easy to visualize.
Definition
Definition
A Gantt chart is a bar chart representation of a project schedule that displays activities as horizontal bars along a time axis, showing start and finish dates, durations, and sometimes dependencies between tasks. Gantt charts are the most widely recognized format for communicating project schedules to owners, project teams, and stakeholders. They are generated by scheduling software from the CPM network model.
Context
Why It Matters in Bidding
Gantt charts are the schedule format most owners and lenders actually read, so the bid-stage preliminary schedule a GC submits shapes perceptions of how realistic and well-planned a proposal is. Estimators and schedulers use them to communicate sequencing, milestones, and durations that back up the bid's general conditions and time-related costs, which can influence award decisions beyond price alone.
Example
Example
To support its bid, the GC's scheduler produced a Gantt chart from the CPM model showing the foundation-to-dry-in sequence and key milestones, demonstrating to the owner that the proposed completion date was achievable within the bid's general conditions duration.
See Also
Related Terms
Resources
Related Tools & Templates
FAQ
Questions Contractors Ask
What's the difference between a Gantt chart and a CPM schedule?
A CPM schedule is the underlying network model that calculates the critical path, float, and logic relationships. A Gantt chart is a visual bar-chart output generated from that model. The Gantt communicates dates and durations clearly, but the CPM analysis behind it is what proves the schedule is logically sound.
Do owners require a Gantt chart with the bid?
Many solicitations require a preliminary project schedule with the proposal, and a Gantt chart is the common deliverable. It demonstrates the bidder understands sequencing and can meet the contract duration. A credible, milestone-driven schedule supports the general conditions pricing and can strengthen a proposal during best-value evaluation.
How do Gantt charts relate to general conditions costs in a bid?
The schedule's overall duration drives time-related general conditions like supervision, trailer rental, and equipment standby. A Gantt chart visualizes that duration and overlap of trades, helping estimators justify the general conditions line and spot where compressing the schedule could reduce overhead or where extensions would add cost.
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