Life

What are Project Interdependencies? (PMI-SP)

What are project interdependencies? Activities in a project may need to be linked with activities in another project. Links between multiple projects is called project interdependencies.

Inter-project dependencies are categorized as either:

  • Dependencies:   These are the capabilities that the project requires from external sources in order to deliver successfully. E.g. task A from the other project will complete then we can start task 'xyz' in this project

  • Contributions:   These are capabilities that the project needs to deliver to external sources.

How to Lock Toolbars in Primavera P6: Two-Step Solution

In Primavera software, there are many toolbars (as shown in the image below). Sometimes, these toolbars disappear (by accidental clicks) or move around in the software from their original position (by dragging with mouse). Obviously, this is an issue when the toolbar is not there or it has moved from its place.

I explained here how to reset toolbars if you find them lost or moved around. 

Now I will explain to you a two-step solution here that will prevent the toolbars to disappear or move from their positions again.

Step 1: Open 'View' menu

Step 2: Click 'Lock All toolbars'

That's it. Now the toolbars will stay where they are.

Benefits of PMI-SP (Scheduling Professional) Certification

PMI-SP (Scheduling Professional) certification is aimed at schedulers, planners, planning engineers and planning engineers primarily. However, PMI-SP is equally beneficial for any engineer or a manager who involves in project scheduling and wants to improve his/her scheduling skills.

PMI-SP certification training prepares you for the PMI-SP exam as well as it makes you proficient in creating schedule strategy, schedule planning and development, schedule monitoring, reporting and closing. Hence, this is a wonderful credential to own, which is also globally recognized and demanded.

Further Benefits of PMI-SP Certification:

  • You learn how to plan and schedule small to large and complex projects.
  • You learn how to perform forensic analysis on your project schedule.
  • You acquire the ability to foresee and control the resource conflicts
  • You build your critical scheduling skills.
  • Employers can trust that you can effectively contribute in project scheduling tasks.

All Round Benefit


By obtaining the PMI-SP credential, you can not only work better at your current company but you can also aim higher positions where your PMI-SP credential will make you stand out as a project scheduling expert.

If you already hold PMI-PMP certification, the PMI-SP certification will surely enhance your job prospects and it will bring confidence in you that you can manage project schedule at expert level.

First, you will take PMI-SP exam preparatory training, from me or anyone else.  Second, you will fill up an online exam application form. Once approved, you can schedule the exam as per your availability. You can even sit in the exam from the comfort of your home.

What Material is Needed to Study PMI-SP

Unlike PMI-PMP, you need to learn many books, though not needed to study the entire books, only portion of the all books content make the PMI-SP exam study and preparatory material.

Here I mention the book names that are required to study for the PMI-SP exam.

1. Practice Standard for Earned Value Management
2. Practice Standard for Work Breakdown Structures
3. Practice Standard for Scheduling

Difference Between Total Float and Free Float in Primavera P6

Both Total Float and Free Float are very important values in Primavera. The planning engineer should keep an eye on both Float types, so that decision making becomes quicker and easier if anything needs to be changed in the plan.

Let's learn what Total Float and Free Float are in Primavera.

Total Float:

By definition Total Float is "number of days an activity can be delayed without delaying project finish date".   Let's understand Total Float more with an example:

Example 1:

Activity A Finish Date: 10 March.  Project Must Finish Date (Deadline) is 20 March. Activity A can be delayed until 20 March, hence delay of 10 days. So, Total Float for Activity A is 10 days.

Example 2:

Activity B Finish Date is 15 April. Project Must Finish Date is 15 April. We can see that Activity B can not be moved forward as it is already finishing on last day of project. So, Total Float of Activity B is 0 days.

Total Float of an activity can be dependent on Total Float of another activity, if both are linked with each other. For example:

Activity A --> Activity B  (Linked with Relationship)

Total Float of Activity B is 0 days.  So, Total Float of Activity A is also 0 because if it moves forward, it will move Activity B forward, hence Activity A can't be moved.  Put another way, the activities are linked, the Total Float of an Activity is the same of the last linked activity.

Free Float:

It is number of days an activity can be delayed without delaying the successor activity.  An activity, when linked with another activity always has 0 Free Float because if it moves, it will also move its successor activity. The activity can have more than 0 Free Float also in case when it has more than one successor and lag between one of the successor activities is longer than of the other successor. 

Remember that Float is also called Slack. If you use Microsoft Project, there is no word Float in there, instead the word Slack is used.

Recommended for you:  Two types of critical activities:  longest path and total float=0 explained

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