Free Float

The maximum time an activity can slip without pushing the early start of any successor or breaking a schedule constraint.

Key Points

  • Free float is measured for a single activity relative to its immediate successors.
  • Computed as the earliest successor's early start minus the activity's early finish, adjusted for leads/lags and constraints.
  • If a successor is scheduled to start as soon as this activity finishes, the free float is zero.
  • Different from total float, which is based on the overall path or project finish date.

Example

Activity B finishes (EF) on day 8. Its earliest successor, Activity C, has an early start (ES) on day 10. Free float for Activity B is 2 days (10 - 8). B can be delayed up to 2 days without delaying C's early start or violating any schedule constraint.

PMP Example Question

Which statement best describes free float?

  1. The total time an activity can slip without delaying the project completion date.
  2. The time an activity can be delayed without delaying the early start of any successor or violating a schedule constraint.
  3. The slack available to the entire network path on which the activity lies.
  4. The extra time created by assigning additional resources to an activity.

Correct Answer: B — The time an activity can be delayed without pushing a successor's early start or breaking a constraint

Explanation: Free float looks only at the relationship between an activity and its successors, not the overall project finish or full path slack.

How To Land the Job and Interview for Project Managers Course

Take the next big step in your project management career with HK School of Management. Whether you're breaking into the field or aiming for your dream job, this course gives you the tools to stand out, impress in interviews, and secure the role you deserve.

This isn’t just another job-hunting guide—it’s a tailored roadmap for project managers. You’ll craft winning resumes, tackle tough interview questions, and plan your first 90 days with confidence. Our hands-on approach includes real-world examples, AI-powered resume hacks, and interactive exercises to sharpen your skills.

You'll navigate the hiring process like a pro, with expert insights on personal branding, salary negotiation, and career growth strategies. Plus, downloadable templates and step-by-step guidance ensure you're always prepared.

Learn from seasoned professionals and join a community of ambitious project managers. Ready to land your ideal job and thrive in your career? Enroll now and take control of your future!



Launch your career!

HK School of Management delivers top-tier training in Project Management, Job Search Strategies, and Career Growth. For the price of a lunch, you’ll gain expert insights into landing your dream PM role, mastering interviews, and negotiating like a pro. With a 30-day money-back guarantee, there’s zero risk—just a clear path to success!

Learn More