Primavera P6 Software Training Melbourne – How to Add Logic Links

primavera P6 Version 8.2_e-book training manualAdding the Logic Links Using Primavera P6 Software in Melbourne

The logic is added to the schedule to provide the order in which the activities must be undertaken.

The logic is designated by indicating the predecessors to, or the successors from, each activity. There are two methods that Primavera software uses to sequence activities:

  • Precedence Diagramming Method (PDM), and
  • Arrow Diagramming (ADM).

Most current project planning and scheduling software, including Primavera, uses PDM. You can create a PDM diagram using the Network Diagram function.

There are several types of dependencies that may be used:

1.       Mandatory dependencies, also known as Hard Logic or Primary Logic, are relationships between activities that may not be broken. For example, a hole has to be dug before it is filled with concrete, or a computer delivered before software is loaded.

2.       Discretionary dependencies, also known as Sequencing Logic or Soft Logic or Secondary Logic, are relationships between activities that may be changed when the plan is changed. For example, if there are five holes to be excavated and only one machine available, or five computers to be assembled and one person available to work on them, then the order of these activities could be set with sequencing logic yet changed at a later date.

Both Mandatory dependencies and Discretionary dependencies are entered into Primavera P6 as activity relationships or logic links. The software does not provide a method of identifying the type of relationship because notes or codes may not be attached to relationships. A Note may be added to either the predecessor or the successor activity to explain the relationship.

  1. External dependencies are usually events outside the control of the project team that impact the schedule. An example would be the availability of a site to start work. This is usually represented in Primavera by a Milestone that has a constraint applied to it. This topic is discussed in more detail in the next section.

The P6 software will calculate the start and finish dates for each activity.  The end date of the project is calculated from the start date of the project, the logic amongst the activities, any Leads(often referred to as Negative Lag)or Lags applied to the logic and durations of the activities.

Eastwood Harris Supplies Project Management Training Manuals, Project Management Training Presentations and Consulting on Primavera P6 and Microsoft Project 2010 across Australia.

Create a Project Using Primavera P6 – Primavera P6 Training Sydney Melbourne Perth

isbn#9781921059575 _Oracle Primavera P6 Training manual_V8-1Creating Projects in Sydney, Melbourne or Perth Using Primavera P6

To create a project in a Primavera database, you will need the following information:

  • An EPS Node, OBS Node in the database to assign the project,
  • Project ID (a code assigned to the project) and the Project Name,
  • The Project Start Date (and perhaps the Finish Date), and
  • The Rate Type. Primavera has five rates per resource and this option enables you to select a rate as the default resources rate.

It would also be useful to know other information such as:

  • Client name, and
  • Project information such as location, project number and stakeholders.

Defining the Calendars

Before you start entering activities into your schedule, it is advisable to set up the calendars. These are used to model the working time for each activity in the project. For example, a 6-day calendar is created for those activities that will be worked for 6 days a week. The calendar should include any public holidays and any other exceptions to available working days, such as planned days off.

Primavera Software has three types of calendars:

  • Global– which may be assigned to activities and resources in any project,
  • Project– these are project-specific calendars assigned to activities, and
  • Resource– that are assigned to resources.

Project and Resource calendars may be linked to Global calendars, enabling any changes to holidays made to a Global calendar to be inherited by the associated Project and Resource calendars.

Defining the Project Breakdown Structures

A project breakdown structure (PBS) is a way of categorizing the activities of a project into numerous codes that relate to the project. The codes act as tags or attributes of each activity.

During or after the activities are added to the schedule, they are assigned their PBSs so that they may be grouped, summarized, and filtered in or out of the display.

Primavera has two principal methods of assigning a PBS to your project:

  • The Work Breakdown Structure (WBS) function, which is comparable to the P3 and SureTrak WBS functions.
  • The Activity Code function that operates in a way similar to P3 and SureTrak.

Before creating a project, you should design your PBSs by asking the following questions:

  • Which phases are involved in the project (e.g., Design, Procure, Install and Test)?
  • Which disciplines are participating (e.g., Civil, Mechanical and Electrical)?
  • Which departments are involved in the project (e.g., Sales, Procurement and Installation)?
  • What work is expected to be contracted out and which contractors are to be used?
  • How many sites or areas are there in the project?

Use the responses to these and other similar questions to create the PBSs.

Eastwood Harris Supplies Project Management Training Manuals, Project Management Training Presentations and Consulting on Primavera P6 and Microsoft Project 2010 across Australia.

Book Review Cont’d – “Project Planning & Control Using Primavera® P6 TM”

isbn#9781921059575 _Oracle Primavera P6 Training manual_V8-1Book Review Cont’d – “Project Planning & Control Using Primavera® P6 TM

Harris is thorough in that he covers the basics of Primavera P6 software and its advanced functions such as User and Administration Preferences and Advanced Scheduling Options, the 3 types of calendars (unlike P3’s 2 types), Roles and Resources and multiple ways of organizing the project (WBS, OBS, Contract, Phase, etc.).

Harris also does a particularly good job in explaining the differences between 3 ways of stating percent complete: Physical Percent Complete, Duration Percent Complete, and Units Percent Complete and the 4 Activity Types.

He has also introduces some new topics not covered in his previous Version 7.0 book , including “Resource Optimization” which includes “Resource Leveling”, “Multiple Project Scheduling”, “User Definable Fields”, “Global Change” and more information on “Managing the Enterprise Environment”.

Since scheduling requirements vary from project to project and company to company, Harris explains how to build and maintain project schedules both with and without resources (manpower, equipment, money, materials).

If you are embarking on migrating to Primavera P6’s complex and IT intensive scheduling system, I urge you to consider using Paul Harris treatise on “Project Planning & Control Using Primavera® P6 TM Paul Harris knows P6 and knows how to explain how to use it effectively and efficiently.

Review by

A. Larry Aaron CCE

President, T&M Concepts

Oracle Primavera P6 training courses are available in Sydney, Melbourne, Brisbane and Perth

Buy the “Project Planning &Control Using Oracle® Primavera® P6 Version 8.1 – Professional Client and Optional Client” Training Manual Now!