During a schedule verification review of a contractor’s Microsoft Project file, a subtle data-entry error can quietly invalidate your entire project forecast. The Red Flag in the Data Look at the task parameters from this progress update: Planned Dates: 20 May '26 – 24 Jun '26 (Duration: 25 days) % Complete: 15% But when looking at the Project Status date: Status Date: 13/08/26 (13 August 2026) The Gantt chart bar ends cleanly in June 2026, while the blue Status Date line sits nearly two months ahead in mid-August. If this 25-day activity is only 15% complete, the remaining 85% of the unfinished work is in the past. Why This Corrupts Schedule Integrity Impossible Forecasts: Time moves in one direction. MS Project will calculate remaining work as if it occurred back in June/July, failing to forecast when the task will actually finish. Artificial Float: The task shows 171 days of Total Slack because the uncompleted duration has not pushed successor links forward. Downstream delays remain completely invisible. Distorted Resource & Cash Curves: Remaining hours and associated costs remain assigned to past calendar months, corrupting Earned Value Management (EVM) metrics How to Fix It in Microsoft Project: - Make a filter to see if there are in progress tasks that have the finish before the status date. - Push Incomplete Work Forward: Go to Project > Update Project, select Reschedule uncompleted work to start after:, and choose the Status Date. (This moves the remaining of the task into the active project future. @planners: Do you receive contractor schedules that are reported as updated but inside there are "forgotten" updates? https://www.linkedin.com/posts/virgil-andrei-14943a30_the-15-complete-trap-during-a-schedule-share-7495953576532418562-3M0b/?utm_source=share&utm_medium=member_desktop&rcm=ACoAAAZ4p0kBPTsKzcJA23Xdrd_RwhPAZoX8sL4

From a serious project planning book… to a Primavera P6 meme. After years of working with project schedules, you learn one important lesson: F9 doesn't change your schedule. Your progress update changes your schedule. F9 simply shows you the consequences. As planners, we know what happens during a progress update. Actual Start dates are entered. Actual Finish dates are entered. Remaining durations are adjusted. Expected Finish dates are updated. Activities are marked as complete or still in progress. And then… You press F9 – Schedule. And suddenly the schedule doesn't look quite like it did before. Activities move. The critical path changes. Float changes. Milestones move. The forecast finish date changes. Here's the reality behind the joke: F9 is not the problem. If your schedule is properly linked and the progress has been accurately updated, F9 is simply doing its job — recalculating the schedule based on the current project information. The important part is understanding why things moved. - Was the Actual Start entered correctly? - Was the Remaining Duration updated realistically? - Was the Expected Finish changed? - Did the activity actually progress as reported? - Did the logic reflect the way the work is now being executed? - Did a change in progress expose an issue that was already there? And here's one simple rule that every planner should follow: SAVE A COPY BEFORE YOU UPDATE. Keep a copy of the previous schedule before making your progress update. Because when the dates move after F9, you may need to go back and compare: What changed? When did it change? Why did it change? Sometimes the difference between a good planner and a great planner isn't just knowing how to schedule. It's knowing how to explain the movement in the schedule. Because… F9 didn't break your schedule. It just told you the truth. @planners: have you ever experienced F9 Schedule changing completely your schedule dates? https://lnkd.in/eKT63dVNhttps://www.linkedin.com/posts/virgil-andrei-14943a30_primaverap6-projectplanning-projectcontrols-share-7492958208093872128-C83n/?utm_source=share&utm_medium=member_desktop&rcm=ACoAAAZ4p0kBPTsKzcJA23Xdrd_RwhPAZoX8sL4

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