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Schedule Performance Index - Labor Unit

3 replies [Last post]
Tanveer Ahmad Niazi
User offline. Last seen 6 years 42 weeks ago. Offline
Joined: 15 Dec 2005
Posts: 151
Groups: GPC Qatar

Hi,

Does anyone tell me how can labor unit schedule performance index be greater than 1

Replies

Gary Whitehead
User offline. Last seen 5 years 32 weeks ago. Offline

Rafael,

 

Very true that SPI will always trend to 1 when the project is late, but this flaw in the measure will never cause the SPI to become greater than 1, which is what the original query is regarding.

Rafael Davila
User offline. Last seen 1 week 4 days ago. Offline
Joined: 1 Mar 2004
Posts: 5241

Are you referring to cost performance or schedule performance?

From the time of the development of Earned Value Management (EVM) indicators, it has been known that the schedule indicators are flawed and exhibit strange behavior over the finalthird of the project, when performance is poor.  

http://www.earnedschedule.com/Docs/Schedule%20is%20Different.pdf

Best regards,

Rafael

Gary Whitehead
User offline. Last seen 5 years 32 weeks ago. Offline

If you've done more work than you planned to do in your baseline, your SPI will be >1.