Circular relationship in primavera

Types of Relationships in Primavera P6 - CEM Solutions

circular relationship in primavera

6 - Creating a Primavera Project WBS. 7 - Adding . Primavera P6 has the following core components: . A Circular Relationship is created when a loop is. The most identifiable cause of Circular Relationships is links on Summary Tasks. Best practise says that the links to & from Summary Tasks. Primavera P6 Activity Relationships Once the scheduler has defined unique activities with realistic durations, the next step of defining activity.

circular relationship in primavera

Or you can test a software after you have developed it. In Finish to Start, relationship arrow originates from finish of the predecessor and finishes at start of the successor. It only means that start of successor activity is controlled by finish of predecessor activity.

In FS relationship, successor activity can start before the finish of predecessor activity if lead is applied to successor.

circular relationship in primavera

This type of relationship is mostly used in the schedule. If you are confused about exact relationship between activities then go for FS relationship. Start to Start or SS: In start to start, start of successor activity is controlled by start of predecessor activity.

circular relationship in primavera

For example when a project starts then project management activities are also started with it. Or you can start leveling of concrete when pouring of concrete is started.

It only means that start of successor activity is controlled by start of predecessor activity. In SS relationship, successor activity can start after the start of predecessor activity if lead is applied to successor. For example, if construction of walls and plaster on these walls are connected with SS relationship, then to start plaster, some portion of the walls must have to be completed.

Primavera P6 Adding Relationships Video

Finish to Finish or FF: In finish to finish, finish of successor activity is controlled by finish of predecessor activity. Or you may want to finish all testing of a software with writing of a software manual so that final software package can be handed over to the client. A soft logic relationship are dependencies that are added by people that prefer to execute activities in certain order. This is because these dependencies are not mandatory and are defined by people.

Dependencies can also be classified as external or internal. For example, an external dependency means that there is a dependency with an activity on another project or an external event. Precedence Diagramming — Relationships The precedence diagramming method is implemented to show activity dependencies.

In a logic view, nodes or rectangular bars represent activities, and arrows show activity dependencies. These can be displayed other ways including on a Gantt chart. There are four types of relationships the scheduler can use to define the dependencies between activities. This is the most common type of relationship where one activity cannot start until another associated activity has finished.

How to Identify and Remove Loop or Circular Relationship in P6 by: AP

An obvious example is that installation cannot start until demolition is complete. This is a relationship where one activity cannot start until another activity has begun. An example is that demolition cannot proceed until the safety plan has commenced.

circular relationship in primavera

In this relationship one activity cannot finish until another related activity has finished. A possible example from the research industry is that documentation cannot complete until experimental testing described by that documentation has finished. In this not so common relationship one activity cannot finish until another activity has begun. An example is the use of a generator that cannot cease until the power is activated.

Primavera P6 Activity Relationships

Lag and Leads Lags and leads have a significant impact on the length of the schedule. A lag describes a required time between activities. In the FS relationship this means that the second activity cannot commence until a scheduled period of time has elapsed after the completion of the first activity.

The most common example is concrete, in which a lag is inserted between activities to allow the concrete time to cure before the successor activity can proceed. After the lag time period has expired then the second activity of installing framing on the concrete flooring can commence. A lead has the opposite effect on the schedule.

circular relationship in primavera

A lead is the amount of time that an activity can start before the completion of the first activity. Many schedulers refer to lead as a negative lag. It is worth noting that leads are not typically recommended and are often avoided by experienced schedulers. Fast Tracking Many times a scheduler will organize activities in a series format where activities are performed one after the other with pure FS relationships.