Level: Intermediate
TCM Section(s):
7.2. Schedule Planning and Development
9.2. Progress and Performance Measurement
Venue: 2023 AACE International Conference & Expo
Abstract: One of the frequently used indexes in the industry is the schedule performance index (SPI), which is calculated by dividing the earned value (EV) over the planned value (PV). As the total earned value equals to the total planned value so the SPI will always tend to 1 at the project completion regardless of the schedule status. The schedule may be delayed and still the SPI is showing tendency to 1. Moreover, SPI can show a value greater than 1, while the schedule is delayed. This happens when the non-critical activities are ahead the planned dates, and its’ value exceeds the values of the critical activities values which are delayed so earned value exceeds the planned value and SPI is greater than 1. SPI may also show a value of less than 1, and the schedule is ahead, this would be the case if the critical activities are ahead, and the non-critical activities values exceed the critical activities and are behind.
To overcome these main SPI fallbacks, this paper and presentation introduces new terminologies, metrics, equations, and indexes for measuring the schedule performance which can be utilized and used for corrective actions for the delayed activities and preventive actions for the future activities.
TCM Section(s):
7.2. Schedule Planning and Development
9.2. Progress and Performance Measurement
Venue: 2023 AACE International Conference & Expo
Abstract: One of the frequently used indexes in the industry is the schedule performance index (SPI), which is calculated by dividing the earned value (EV) over the planned value (PV). As the total earned value equals to the total planned value so the SPI will always tend to 1 at the project completion regardless of the schedule status. The schedule may be delayed and still the SPI is showing tendency to 1. Moreover, SPI can show a value greater than 1, while the schedule is delayed. This happens when the non-critical activities are ahead the planned dates, and its’ value exceeds the values of the critical activities values which are delayed so earned value exceeds the planned value and SPI is greater than 1. SPI may also show a value of less than 1, and the schedule is ahead, this would be the case if the critical activities are ahead, and the non-critical activities values exceed the critical activities and are behind.
To overcome these main SPI fallbacks, this paper and presentation introduces new terminologies, metrics, equations, and indexes for measuring the schedule performance which can be utilized and used for corrective actions for the delayed activities and preventive actions for the future activities.