Schedule Slippage Percentage

=(ACTUAL_FINISH-PLANNED_FINISH)/PLANNED_DURATION

Implementation Guide

This project management task calculates schedule slippage as a percentage of the planned duration, providing a normalized view of delays. It allows project managers to compare slippage across tasks or projects of different sizes. The metric is intuitive for stakeholders and supports escalation decisions. When tracked over time, it helps identify systemic planning or execution issues. The calculation is simple and auditable, making it suitable for governance reporting. It works well alongside earned value and milestone tracking metrics.

💡 Expert Q&A Insights

Q: Can this be negative?

Yes, early completion results in negative slippage. |

Q: Should it be capped?

Capping may help presentation but should be documented.

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