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Schedule Compression: Fast-Tracking and Crashing in Primavera P6




In today's dynamic construction and project management landscape, delays can be costly and often detrimental to project success. At MegaPlan, we understand the importance of delivering projects on time, so schedule compression techniques like fast-tracking and crashing are essential tools for project managers. This article explores how these techniques can be effectively applied using Primavera P6 to ensure your project stays on schedule, even when unexpected delays occur. Schedule compression is shortening a project's duration without changing its scope. It is typically used when a project is behind schedule or when there is a mandate to deliver the project sooner than initially planned. The two main techniques for schedule compression are:


1. Fast-Tracking: Overlapping Activities


Fast-tracking involves executing activities in parallel that were initially planned to be done sequentially. This can be particularly useful in construction projects where different phases like design, procurement, and construction can overlap to save time.




Benefits of Fast-Tracking:


  • Shortens project timelines without additional costs.


  • Allows for flexibility in the schedule, especially when deadlines are tight.


Risks of Fast-Tracking


  • Increases the risk of rework due to incomplete information.


  • Requires efficient communication and coordination between teams.


Applying Fast-Tracking in Primavera P6:


  • Step 1: Identify activities with dependencies that can be safely overlapped.


  • Step 2: Adjust the relationship types (e.g., changing 'Finish-to-Start' to 'Start-to-Start').


  • Step 3: Use Primavera P6's Relationship Lag feature to fine-tune overlaps and ensure realistic scheduling.


Example: Instead of waiting for the foundation work to be finished before starting the superstructure, you could start the superstructure work once 50% of the foundation is complete.


2. Crashing: Adding Resources


Crashing involves adding more resources to critical path activities to shorten their duration. This technique is often used when fast-tracking is not feasible, or additional resources can speed up the project without significantly increasing costs.





Benefits of Crashing:


  • Reduces project duration by allocating additional resources.


  • Can be a quick fix for time-sensitive deadlines.


Risks of Crashing:


  • Increases project costs due to overtime, additional equipment, or hiring more staff.


  • Higher likelihood of resource conflicts and quality issues if not managed properly.


Applying Crashing in Primavera P6:


  • Step 1: Identify activities on the critical path that can be shortened by adding resources.


  • Step 2: Use the Resources tab in Primavera P6 to allocate additional labour, equipment, or materials.


  • Step 3: Monitor resource usage to avoid overallocation or burnout.


Example: If a critical task is scheduled to take 10 days with one team, adding a second team could potentially reduce the task duration to 5 days.


Best Practices for Schedule Compression in Primavera P6


  1. Baseline Comparison: Always create a baseline schedule before applying compression techniques. This helps track the impact of fast-tracking or crashing on the project timeline.


  2. Critical Path Analysis: Focus on activities on the critical path, as shortening non-critical tasks will not affect the overall project duration.


  3. Regular Updates and Monitoring: Use Primavera P6 to monitor progress in real time. Schedule updates and progress tracking ensure that schedule compression techniques are working as intended.


  4. Collaboration and Communication: Ensure all stakeholders are aware of the changes. Communication is key to successfully implementing schedule compression.


Key Considerations for Using Fast-Tracking and Crashing


When applying schedule compression techniques, it's crucial to consider the following:


  1. Project Constraints: Not all activities can be overlapped or accelerated without impacting quality.


  2. Cost vs. Benefit Analysis: Crashing may significantly increase project costs, so it should only be used when necessary.


  3. Risk Management: Fast-tracking and crashing can introduce new risks, such as resource conflicts or quality issues. It's essential to conduct a thorough risk assessment before implementing these techniques.


Fast-tracking and crashing are powerful techniques in the project manager's toolkit to ensure timely project delivery, especially in fast-paced industries like construction, industrial, and petrochemical sectors. By leveraging the advanced scheduling features of Primavera P6, you can efficiently compress schedules without compromising on quality or incurring excessive costs.

At MegaPlan, we specialize in optimizing project schedules and implementing effective project management strategies. Contact us today to learn how we can help you keep your projects on track.


  1. Let's build success, one schedule at a time!

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