Which of these precedence relationships is most commonly used in the precedence diagramming method?

Contents

• 1 Which type of relationship is often used in Precedence Diagramming Method PDM?
• 2 Which of the following is the most commonly used type of precedence relationship?
• 3 Which of these types of precedence relationships is least commonly used in the precedence diagramming method?
• 4 What is a start to finish relationship?
• 5 What is a precedence relationship?
• 6 What is precedence network?
• 7 What is the Precedence Diagramming Method ( PDM )?
• 8 What is the finish to finish relationship in PDM?
• 9 Is there such a thing as a PDM dependency?

Which type of relationship is often used in Precedence Diagramming Method PDM?

The 4 types of logical relationships in the precedence diagraming method are: Finish-to-Start (FS) dependency, Finish-to-Finish (FF) dependency, Start-to-Start (SS) dependency, and.

Which of the following is the most commonly used type of precedence relationship?

In PDM, finish-to-start is the most commonly used type of precedence relationship.

Which relationship model is most commonly used in the precedence diagram?

Precedence Diagramming Method (PDM) is the most common method to draw network diagrams.

Which of these types of precedence relationships is least commonly used in the precedence diagramming method?

Which of these types of precedence relationships is least commonly used in the Precedence Diagramming Method? Start to finish relationships indicate that the next task cannot be completed until the one preceding it has started. This type is not commonly used.

What is a start to finish relationship?

Based on more theoretical definition, “Start-to-Finish” refers to the relationship between two activities that the completion of successor is dependent on the initiation of its predecessor. So, the successor cannot be finished until the start of the predecessor.

What is precedence network diagram?

Precedence Diagram Method (PDM) is a visual representation technique that depicts the activities involved in a project. It is a method of constructing a project schedule network diagram that uses boxes/nodes to represent activities and connects them with arrows that show the dependencies.

What is a precedence relationship?

The most common precedence relationship is when one activity cannot start until another activity has finished. In most schedules this is the relationship that exists in almost all (if not all) cases. This is referred to as a Finish-to-Start relationship.

What is precedence network?

What is the difference between finish to start and start to finish?

Finish to Start (FS)—The predecessor ends before the successor can begin. Start to Start (SS)—The predecessor begins before the successor can begin. Finish to Finish (FF)—The predecessor ends before the successor can end.

What is the Precedence Diagramming Method ( PDM )?

What Is the Precedence Diagramming Method (PDM)? PDM is a scheduling technique of the ‘sequence activities’ process in PMI methodology.

What is the finish to finish relationship in PDM?

Finish-to-Finish Relationship (FF) Under this type of logical relationship, a successor activity requires the predecessor activity to be finished before it can be completed. This type of dependency can also coincide with start-to-start relationships of the same activities.

Which is the second type of dependency in Precedence Diagramming?

The second type of dependency in Precedence Diagramming Method is Discretionary Dependency which is known as preferred, preferential or soft logic as well. Discretionary dependency is determined by the project team and can be changed in order to shorten the project.

Is there such a thing as a PDM dependency?

In practice, this type of dependency does not occur very often which is also acknowledged by the PMBOK. This example of PDM modeling refers to a fictional software development project.

Post navigation

Precedence Diagram Method (PDM) is a visual representation technique that depicts the activities involved in a project. It is a method of constructing a project schedule network diagram that uses boxes/nodes to represent activities and connects them with arrows that show the dependencies.

Purpose of Precedence Diagram Method (PDM)

The Program Evaluation and Review Technique (PERT) and Critical Path Method (CPM) techniques are essentially limited to “finish-start” relationships (i.e., activity B cannot start until activity A is completed). PDM was developed subsequent to the PERT/CPM techniques and its function is to permit a more accurate depiction of relationships among various activities.

How is the Precedence Diagram Method (PDM) Depicted

The Precedence Diagram is depicted by a chart with nodes and their relationships. An arrow connects two nodes to represent an active relationship. It’s also called a nodal diagram or network diagram.

Precedence Diagram Method (PDM) Benefits

There are a lot of benefits that can be obtained by using the PDM. These are:

• Highlights relationships and dependencies among activities to ensure planning efficiency.
• Identifies possible missing activities.
• Helps identify critical activities to ensure better planning.
• Helps develop the overall project schedule.
• Good communication tool for project team members.

The Four Precedence Diagram Methods (PDM)

The PDM has four ways of developing the diagram. These methods are:

• Finish-Start: In this dependency, an activity cannot start before a previous activity has ended. This is the most commonly used dependency.
• Start-Start: In this dependency, there is a defined relationship between the start of activities.
• Finish-Finish: In this dependency, there is a defined relationship between the end dates of activities.
• Start-Finish: In this dependency, there is a defined relationship between the start of one activity and the end date of a successor activity. This dependency is rarely used.

Steps to Developing a Precedence Diagram

• Step 1: Break your Work Breakdown Structure (WBS) into activity levels.
• Step 2: List all activities and their sequences in a table.
• Step 3: Add relationships and dependencies to each activity in the table.
• Step 4: Draw the diagram.

Precedence Diagram Method (PDM) Dependency Levels

• Mandatory Dependency: known as hard logic is an integral part of the work. Example: Activity A must be completed before activity B can start.
• Discretionary Dependency: preferential or soft logic. Example: Dependency is controlled by the project team and can be changed.
• External Dependency: Comes from outside of the project. Example: Laws and Regulations or waiting for government funding to begin the project.
• Internal Dependency: involves a precedence relationship between project activities. Example: Can’t start until the previous internal project is completed.

How a Precedence Diagram Method (PDM) Helps Program Managers

Network scheduling techniques provide Program Managers with a powerful tool for scheduling and controlling their programs/projects. In general, they permit the graphic portrayal of project activities and relationships among the activities. This provides the basis for determining the project’s critical path, predicting shortages, and identifying possible reallocation of resources to solve problems.

Through the use of readily available software, network schedules are fairly easy to update and rework, thus providing managers with current program/project status information and control over activities and schedules. [1]

AcqNotes Tutorial

AcqLinks and References:

• Defense System Management College “Scheduling Guide for Program Managers” – Oct 2001
• DoD “Integrated Master Plan and Integrated Master Schedule Preparation and User Guide” – 21 Oct 2005
• CDC “Project Scheduling Best Practices/Guide” – 30 Jun 2007
• GAO 12-120G “Schedule Assessment Guide: Best Practices for Project Schedule” – May 2012

Updated: 9/7/2022

Rank: G1.5