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Time is the dominant constraint on all projects.  There is a constant race against the clock.  Many projects have fixed completion dates determined by external forces. Projects that fall behind schedule, struggle to catch up.  I have never met a project manager who said there was too much time.

"Time is also a unique resource. One cannot rent, hire, buy, or otherwise obtain more time...Time is totally irreplaceable.” –Peter Drucker

Most Likely Schedule, what is it?

Unfortunately when it comes to resources and resource leveling, P6 model is absolute. P6 doesn’t calculate the float correctly and the longest path will not be accurate since the late and early dates will not change after leveling.

Primavera P6 doesn’t take in consideration the new dates after the leveling in calculating the total float or the longest path, to illustrate further if we have a project consists of three activities A,B & C and they all share the same resource and each activity 5 days duration and the project completion after 15 days.

The negative float is a very popular hot topic in the scheduling field and it’s generated when the late dates are less than the early dates and usually it’s accompanied with a delay in the project, and a lot of project management professionals think that the only reason for a negative float is because a constraint that has been used in the schedule. Although the first thing you look for when you see a negative float is the constraints that are applied to the schedule, but that not the only reason that generates the negative float in P6.

Primavera provide a tool called Progress Line to compare Actual Progress (Activity % Complete) with Baseline on Gantt chart.

I will show you how to do it.

If I asked you what the trickiest part of project management was for your enterprise, what would you say?  If you answered managing the diverse projects in your portfolio – you’re not alone. Most businesses work on a variety of projects (whether it be different contract types, duration or dollar amounts) that can be categorized into four major tiers:

"Individual commitment to a group effort--that is what makes a team work, a company work, a society work, a civilization work."  Vince Lombardi

Primavera P6 give us an option to decide that Baseline date is equal to Planned date or Current date.

The main purpose of this option is for Earned Value calculation.

Standard deviation is an abstract concept derived from observation rather than calculation or experimentation.  The standard deviation (SD, also represented by the Greek letter sigma or σ) is a measure that is used to quantify the amount of variation or dispersion in a set of data values; and is expressed as a quantity defining how much the members of a group differ from the mean value for the group.