Thresholds consists of parameters which can be assigned to a WBS and can be use to generate an issue incase the Threshold is crossed. They are particularly helpful during the monitoring phase of the project when you have a large number of activities to monitor and cannot review each one by one. Thresholds can be created for following parameters :
1) Variance (days) – Start Date, Finish Date, Total Float ,Free Float
2) Percentage (%) – Duration % of Planned , Cost % of Planned
3) Money ($ etc.) – Accounting Variance, Cost Variance, Schedule Variance, Variance at completion
4) Ratio – CPI, CVI, SPI, SVI
To add a Threshold you need to do the following :
1) Click on Thresholds tab
2) Click on the button add
3) Thresholds gets added with default settings
After adding the Threshold you need to add the Threshold parameters for monitoring in the Bottom Tab.
General Tab :
1) Threshold Parameter – Choose the parameter for which you want to monitor the Threshold
2) Lower Threshold / Upper Threshold – Define the parameters between which the threshold will be monitored
3) WBS to Monitor – Define the WBS to monitor with this threshold
4) Detail to Monitor – Choose the level at which you want to monitor the Threshold WBS/ Activity.
Lets say you have chosen the Threshold Parameter ‘Start Date Variance (days)’ then the variance will be calculated on WBS level or Activity level based on the Detail to Monitor option chosen.
5) Responsible Manager – Choose the Responsible Manager for this Threshold
6) Tracking Layout – We can assign default tracking layouts to thresholds and their issues. This enables us to use the Issue Navigator to quickly open the tracking layout that best displays the threshold’s issue details.
7) Status – Enabled/Disabled – Self Explanatory
8) Issue Priority – We can assign priority to the issues from 1 to 5 based our assumption
Details Tab :
1) Monitor Time Window – Give a Start and End time window to monitor the Threshold
2) Threshold Issues – Issues generated due to the Threshold are listed in this window and same can be analyzed using the go to option
Once you have entered the Threshold parameters, you need to go to Tools > Monitor Thresholds > Click Monitor
You can use the original monitor window or give new dates to monitor the Thresholds
Let’s take an example of a Threshold with following parameters :
Total Float (days) – Lower Threshold – 5 days, Upper Threshold – 150 d
when we click on monitor Primavera checks for activities which have total float value less than 5 days and greater than 150 days.. The activities identified are tagged as issues and you can check them in the Issues Tab.
This Threshold helps us to monitor all the activities which become nearly critically during the course of our project and the activities which have unusually High Float values and need to be checked.
Similarly other Thresholds can be used to generate issues and can help us to better monitor our project.