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Topics: Schedule Management, Scheduling
Hi, could someone give me an explanation of what is PF(t) in schedule management ?
PF(t) is mentioned in the Practice standard for Scheduling - chapter 3.4.12 p88.
I don't see any explanation about this indicator in the document.
Thank you to enlighten me on this topic.
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Rami Kaibni
Community Champion
Senior Projects Manager | Field & Marten Associates New Westminster, British Columbia, Canada
Freferic, I can see it is mentioned once in Section 3/Page 88 in the table under the predictors equation. As far as I know, PF(t) refers to "Planned Finish Time" for a specific activity, task or the whole project within a schedule. It represents the expected or scheduled completion time for that activity or project as defined in the project plan.
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Keith Novak Tukwila, Wa, USA
It's a term from Earned Schedule similar to Performance Factor (PF) in EVM. In EVM you use CPI and SPI for actual performance compared to plan. Those are essentially efficiency factors.

Like EVM compares work planned to work actually completed, Earned Schedule uses the time planned vs. the time expended.

PF(t) is an estimated future efficiency rather than basing it on past performance (SPI). SPI and CPI are performance factors based on prior data (Actual performance/Planned). If you think your performance will remain as it was, you can use SPI to estimate remaining time. If you think your SPI will change, you can use different performance factors to estimate the remaining time to complete the work.

This page has the comparisons between the formulas for the 2 methods:
https://www.earnedschedule.com/terminology.shtml
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1 reply by Frederic SABATIE
Feb 23, 2024 9:37 AM
Frederic SABATIE
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thank you Keith, that's crystal clear
I think an update of the document p88 would be useful to add the information that PF(t) is the Performance Factor and how it could be calculated. I don't know whom to contact for that ......
Thank you Rami
Feb 22, 2024 6:17 PM
Replying to Keith Novak
...
It's a term from Earned Schedule similar to Performance Factor (PF) in EVM. In EVM you use CPI and SPI for actual performance compared to plan. Those are essentially efficiency factors.

Like EVM compares work planned to work actually completed, Earned Schedule uses the time planned vs. the time expended.

PF(t) is an estimated future efficiency rather than basing it on past performance (SPI). SPI and CPI are performance factors based on prior data (Actual performance/Planned). If you think your performance will remain as it was, you can use SPI to estimate remaining time. If you think your SPI will change, you can use different performance factors to estimate the remaining time to complete the work.

This page has the comparisons between the formulas for the 2 methods:
https://www.earnedschedule.com/terminology.shtml
thank you Keith, that's crystal clear
I think an update of the document p88 would be useful to add the information that PF(t) is the Performance Factor and how it could be calculated. I don't know whom to contact for that ......
...
1 reply by Keith Novak
Feb 25, 2024 3:58 PM
Keith Novak
...
Laura Schofield As our online community rep, can you field the question as to how to suggest document updates when there are suggested improvements?
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Sergio Luis Conte Helping to create solutions for everyone| Worldwide based Organizations Buenos Aires, Argentina
Tying to add something to the great comments above my recommendation is, when you are studying for a PMI certification, do not forget the Glossary of Terms. I know that most in the case you will not find a full explanation there but I think is very useful when you are in the process to get a certification.
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Keith Novak Tukwila, Wa, USA
Feb 23, 2024 9:37 AM
Replying to Frederic SABATIE
...
thank you Keith, that's crystal clear
I think an update of the document p88 would be useful to add the information that PF(t) is the Performance Factor and how it could be calculated. I don't know whom to contact for that ......
Laura Schofield As our online community rep, can you field the question as to how to suggest document updates when there are suggested improvements?
avatar
Laura Schofield
PMI Team Member
Online Community Specialist| Project Management Institute Newtown Square, PA, USA
Sure thing Keith Novak!

Frederic SABATIE you may provide your feedback to [email protected]. This inbox is monitored by a Standards & Publications team member, and your comments will be directed to the appropriate person for review and follow-up.

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