Construction Schedule Calculator Guide
The Critical Path
Scheduling isn't just a calendar; it's a logic puzzle. Some tasks can happen at the same time (Parallel), while others must happen one after another (Sequential).
CPM (Critical Path Method)
The "Critical Path" is the longest sequence of dependent tasks. If any task on this path is delayed, the entire project is delayed.
Example: Foundation → Framing → Roof → Drywall.
You can't hang drywall until the roof is on (to keep it dry). This is a critical path.
Visualizing the Plan
Gantt Chart
The industry standard. Horizontal bars show start and end dates.
- Pros: Easy to see overlaps and duration.
- Cons: Can get messy for huge projects.
Milestone Schedule
High-level view for owners/banks.
- Focus: "Foundation Done," "Dried In," "Final Inspection."
- Use: Triggers payments (draws).
Frequently Asked Questions
What is 'Float' or 'Slack'?
How do weather delays work?
What is 'Lead Time'?
Why is the schedule always wrong?