Article 2 of 14
Slightly earlier than promised.
In our first article looking at the 14 point check we described how we checked Logic, in this post we are going to take a look at Negative Lag, or Leads if you prefer. Again this approach was used for the same client as in the previous post.
Negative Lag Check
This check looks at the Negative Lag between activities.The criteria states that there should be 0% of Negative Lag in a schedule.
To check this in Primavera P6 we used the following steps:
Step 1. Check the Project activity totals, which can be found in the Project View in the ‘Total Activities’ column. Make a note of this number.
Step 2. Create a report in Primavera P6 that filters out activities that have zero or positive lag, we just want the Negative Lag values.
Step 3. Run the report making sure to save as an ASCII Text File, the report should open in Microsoft Excel.
Step 4. Highlight the Negative Lag values which will give you a count, make a note of this number.
Step 5. Divide the count of activities by the total number of activities (the number from Step 1) and this will give you a %. If the percentage is 0% or lower, then the criteria has been met, if not then a review of the schedule lags may need to take place.
There are a further 13 checks prescribed by the DCMA which along with the Logic Check will be detailed out in further supporting documentation and video tutorials at http://www.myxacom.com where knowledge is no weight to carry.