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A project network diagram, also known an activity network diagram (AND) is a
graph Graph may refer to: Mathematics *Graph (discrete mathematics), a structure made of vertices and edges **Graph theory, the study of such graphs and their properties *Graph (topology), a topological space resembling a graph in the sense of discret ...
that displays the order in which a project’s activities are to be completed. Derived from the
work breakdown structure A work-breakdown structure (WBS) in project management and systems engineering is a breakdown of a project into smaller components. It is a key project management element that organizes the team's work into manageable sections. The Project Mana ...
, the terminal elements of a project are organized sequentially based on the relationship among them. It is typically drawn from left to right to reflect project chronology.


Techniques


Activity-on-Node

The Activity-on-Node (AON) technique uses nodes to represent individual project activities and path arrows to designate the sequence of activity completion. Nodes are labelled using information pertaining to the activity. According to Project Management, nodes should at least display the following information: * Identifier * Descriptive label * Activity duration * Early start time * Early finish time * Late start time * Late finish time * Activity float (slack) Start and finish times are used to determine the critical path of a project. Activity float, or slack, time is used in project crashing.


Other techniques

The condition for a valid project network is that it doesn't contain any
circular reference A circular reference (or reference cycle) is a series of references where the last object references the first, resulting in a closed loop. Simple example A newcomer asks a local where the town library is. "Just in front of the post office," s ...
s. Project dependencies can also be depicted by a predecessor table. Although such a form is very inconvenient for human analysis,
project management software Project management software are computer programs that help plan, organize, and manage resources. Depending on the sophistication of the software, it can manage Software development effort estimation, estimation and planning, Schedule (workplace) ...
often offers such a view for data entry. An alternative way of showing and analyzing the sequence of project work is the design structure matrix or
dependency structure matrix The design structure matrix (DSM; also referred to as dependency structure matrix, dependency structure method, dependency source matrix, problem solving matrix, incidence matrix, ''N2'' matrix, interaction matrix, dependency map or design precede ...
.


See also

*
Bar chart A bar chart or bar graph is a chart or graph that presents categorical variable, categorical data with rectangular bars with heights or lengths proportional to the values that they represent. The bars can be plotted vertically or horizontally. A ...
*
Float (project management) In project management, float or slack is the amount of time that a task in a project network can be delayed without causing a delay to: * subsequent tasks ("''free float''") * project completion date ("''total float''"). ''Total float'' is assoc ...
*
Gantt chart A Gantt chart is a bar chart that illustrates a schedule (project management), project schedule. It was designed and popularized by Henry Gantt around the years 1910–1915. Modern Gantt charts also show the Dependency (project management), depe ...
*
Project management Project management is the process of supervising the work of a Project team, team to achieve all project goals within the given constraints. This information is usually described in project initiation documentation, project documentation, crea ...
*
Project planning Project planning is part of project management, which relates to the use of schedules such as Gantt charts to plan and subsequently report progress within the project environment. Project planning can be done manually or by the use of project ma ...
*
Program evaluation and review technique The program evaluation and review technique (PERT) is a statistical tool used in project management, which was designed to analyze and represent the task (project management), tasks involved in completing a given project. PERT was originally ...


References


External links


Critical Path Mapping with Activity Network Diagrams

Understand how scheduling tools works-Draw network diagram yourself
Charts Project management techniques Schedule (project management) {{business-stub