How to Calculate Critical Path in Project Management

How to Calculate Critical Path in Project Management
Critical path in project management refers to the sequence of tasks essential to your project’s success. It’s the longest series of tasks within your project, and if any of those tasks are delayed, it will push out your project end date. Tasks that aren’t on the critical path can be delayed without impacting your overall schedule.
Many scheduling tools will automatically identify your critical path for you, as long as you build the following key elements into your schedule:
- All project tasks with start and end dates
- Task durations
- Task relationships or dependencies
How to manually calculate critical path in project management
If you’re not using project management software, or just want to double-check things for yourself, here is how to manually calculate the critical path in project management.
- Identify all your activities or tasks and note their durations and relationships.
- Build a schedule network diagram, which is a visual sequence of how your tasks interrelate.
- Identify all possible paths through the diagram, and add up all tasks’ duration to calculate the time to complete each path.
- The path that has the longest total duration is your critical path.
The benefits of calculating critical path in project management
Once you identify your project’s critical path, you can quickly understand if a delay will impact the overall project and react accordingly. You can prioritize activities on the critical path and reschedule less essential tasks to spread out resources.
Further reading:
- Critical Path Method in Project Management is as Easy as 1,2,3
- How 5 PM Experts Create a Fail-Safe Project Management Plan
- Task Dependencies vs. Custom Workflows: When to Use Each in Wrike
- Critical Path Analysis in Wrike: Adjust Project Schedules Without Delaying Results
- The Project Management Beginner’s Guide to Gantt Charts
What is Critical Path in Project Management?

Agile methodology in project management is an iterative approach that delivers work in small, flexible cycles to adapt quickly to change. It emphasizes collaboration, customer feedback, and working solutions over rigid plans and heavy documentation. Guided by Agile values and principles, it helps teams deliver value faster, improve quality, and respond effectively to evolving requirements.
PRINCE2 (PRojects IN Controlled Environments) is a structured, process-based project management methodology that emphasizes control, organization, and clear governance throughout a project’s lifecycle. It divides work into defined stages, assigns clear roles and responsibilities, and focuses on business justification, risk management, and continuous learning to ensure projects remain aligned with objectives and deliver consistent, successful outcomes.
A project management methodology is a structured framework that defines how projects are planned, organized, executed, and controlled. It provides consistent processes, tools, and rules to guide teams from start to finish. Common methodologies such as Agile, Waterfall, Scrum, and PRINCE2 help ensure projects are delivered efficiently, consistently, and in alignment with defined goals and constraints.
The principles of project management are core guidelines that support successful project delivery. They emphasize having a formal structure, clear goals, defined roles, engaged sponsorship, effective communication, and strong change and risk management. Together, these principles help project managers control scope, manage performance, deliver value, and guide teams toward achieving agreed project outcomes efficiently.
An Agile project manager supports teams working in flexible, iterative environments by promoting collaboration, adaptability, and continuous improvement. Rather than directing work hierarchically, they act as facilitators, coaches, and change leaders who remove obstacles, support stakeholders, and help teams deliver value through short cycles aligned with Agile principles and customer feedback.
