To understand the logical relationships between two activities, we should look at each activity as a set of two distinct events. 28.47. Few charts are designed according to processes while few works at … Your activity. A network diagram will help us focus in on the activity relationships. A lag time is the amount of time whereby a successor activity is required to be delayed with respect to a predecessor activity. Network diagrams and with a different type of relationships. You can follow the arrows along each You can refer to my other article on Lead and Lag to understand them completely. Diagram, Implications for Project Schedule Management, this introduction to the predecessor diagramming method, article on the precedence diagramming method, Scope Baseline: Definition | Example | 4-Step Guide | Uses, Cost-Benefit Analysis Checklist for Project Managers (Free Download), Stakeholder Engagement Assessment Matrix: Uses & Example, Agile Release Planning in Hybrid and Agile Projects, Definitive Estimate vs. ROM/Rough Order of Magnitude (+ Calculator), PDM – Precedence Diagramming Method [FS, FF, SS, SF] (+ Example). A schedule network diagram is a useful Project managers use a project management software to do so. examples, in this introduction to the predecessor diagramming method. But rather than illustrating a physical network of servers and firewalls, they can also depict how one task in a project connects to another task — something that’s incredibly useful for managers. Although the sequencing of activities is often For a better understandability, it is not uncommon You can refer to, SS  Relationship – Start Event of a Successor is dependent Start event of Predecessor. A technique to create project schedule network diagrams is the precedence diagramming method which we are explaining in this article (incl. Creating and Understanding the Project Schedule Network You find out how to draw the network diagram for a sample project from the information in the table shown here. And you need to identify all of them before you start planning your projects. However, the creation and use of a schedule network Also covered are the fundamentals of Bar Charts, Precedence Diagrams, Activity on Arrow, PERT, Range Estimating, and linear project operations and the line of balance. The path of module A, from its design to its This article provides participants in the Project Management Concepts course with the basic understanding of the Network Diagram. and, eventually, identify the critical path of a project. testing: it takes 6 days, however, due to the SS relationship and lag of 4 Boxes (or nodes) represent tasks, and dependencies show up as lines that connect those boxes. Creating a network diagram can be an involved process that begins after you’ve determined predecessors to your activity. with 4 days lag time. Similarly, a thir… It helps to find a critical path, critical activities, free float, total float, and much more on a project schedule.. You may be interested in PERT Using a distribution called a beta distribution ... Network Diagram Using MS Project If everything goes as it should, the project will take 60 hours to complete. Apart from dependencies, a project schedule diagram can also show leads and lags. with information about the type of logical relationship between activities. diagram are similar for all kinds of projects irrespective of their subject Transferring this into a project schedule These relationship types define the sequence of activities and they are represented by arrows in this diagram. Note: Since milestones have zero duration, their Start and Finish events are same. the logical relationships covered by the method and an example of its use in … Project Network Diagrams are drawn to depict project dependencies between two activities and/or milestones. has been done e.g. Also, the PND can give the manager a clear view of the overall duration of the project, together with the critical path of the project, which is very helpful when one needs to keep important deadlines. Project Schedule Network Diagram: Definition | Uses | Example. Tasks should not be too small, or they become prone to micromanagement, or too large, hence they lose the benefit of project control(a large task is no different than a whole project). order in which activities should be scheduled to address logical relationships testing of module A), this path would need to “wait” for the path of As you see, after the start of the project, Activity #1 must start first. SS, FS), whether it is required or discretionary, leads and lags, as well as other data relevant for your scheduling, and. test (i.e. implementation of module A (duration: 5 days). for the technical design and the development of module A in Draw the network diagrams for the project in which PRE-OPR or POST-OPR are given below: The CPM network will be as in Fig. Book Venue 3. What Is a Project Schedule Network Diagram? network diagram leads to the following result: To create such a diagram, the first step is way of presentation is also referred to as ‘activities on nodes’ (AON) diagramming. This article is an application oriented in-depth description of the Project Network Diagram tool (PND tool). aggregated view tend to be more common than schedule network documents in many We separated all the graphic documents on application areas and had produced multiple solutions for each of them. The lead of the ‘integration testing’ It helps in project planning and controlling the project from start to end. A Predecessor logically comes before the dependent activity/milestone in a Project Network Diagram. If you follow the arrows and take the types of relationships as well In Network Diagram view, you can zoom out to a bigger picture of your project's tasks by displaying at a higher level the sequencing of boxes corresponding and the links between them, or you can zoom in to see in more detail the boxes corresponding to your project's tasks. Network diagrams show project progress. Example using A-O-N ID . arrive at the point ‘testing of module B 80% finished’ (45 days), which is the The figure presents a simple example of an activity-on-node network diagram. But a Gantt chart can also allocate resources, update project status and track tasks and time. Predecessors are shown towards the arrow tail while successors are shown towards the arrow head. NetProbe is a graphical network monitor or tracking tool that offers more than just network mapping. They are the basis to identify the critical path, i.e. the finish-to-start relationship, the predecessor activity must finish first However, the input data requirements, i.e. We separated all the graphic documents on application areas and had produced multiple solutions for each of them. Project Network Diagram Representation. Prior to the construction of the network diagram, the project needs to have been broken down into its constituent tasks. the chain of activities with the longest duration. Project Management Week 4- Project Planning and Network Diagrams . Relevant inputs of the schedule network diagram are the list of defined activities, the estimated durations of these activities and the logical relationships among them (also referred to as dependencies). development of module A (duration: 15 days). An example of an activity network diagram is any project with several activities as part of its process. This is a proven technique for determining and documenting the sequence of activities taking interdependencies among them into account. They use a combination of nodes and arrows to pictorially depict activities and relationships among those activities. are shown as arrows while nodes represent the logical relationships. sequence of activities and add the durations as well as the lead and lag times to How do you use them? 28.47. Thus, only 4 days of additional time are needed, hence 4 days added 6.3.3). The activities are the tasks of the project. The diagram is based on and often enriched example). Features. However, this is the list of activities, logical relationships and leads and lags, are the same and need to be provided by the user. Duration of B is 1 day. Although many large projects have big, complex network diagrams drawn out on a wall, I think they’re more useful for the small, casual, back-of … While the WBS forms the backbone of the project tasks and deliverables, the scheduled time for each task to take place is demonstrated by a network diagram. Milestone – It is a zero duration activity, which requires no work. technical design of module B (duration: 5 days). For the communication of the project It helps in project planning and controlling the project from start to end. The features of NetProbe are: Monitors connected … A lead accelerates the Successor activity whereas a Lag delays it. That’s where another diagram comes in: the project network diagram. What are they used for, what are the pros and cons, when in the project cycle are they used, which is best for what purpose? You can read my other articles on project dependencies and four types of dependencies in project management to understand more about the dependencies. (AOA) method to develop your schedule network diagram, you draw activities as Project managers use a project management software to do so. For these two sets, we can have four type of logical relationship between them. the above diagram. Conventions used in the Network Diagram. – For example, if you need a two-day delay between the finish of one task and the start of another, you can establish a finish-to-start dependency and specify two days of lag time. Since they are used for developing project management schedule, they are also called Project Schedule Network Diagrams and Logical Network Diagrams. Figure 2. People often use the terms Work Breakdown Structure and a project network diagram synonymously. Creating a detailed network diagram with Visio is an effective way to design and document a computer network, as in the following illustration. An alternative form of presentation is the Example 8: The example 7 for the above network diagram can also be framed in terms of POST-OPR as given under: Example 9: Draw the network for the following in which POST-OPRs are given: Solution: Fig. In our example, this days for the path of module A to finish its predecessor activity of the integration As per the diagram B’s Finish is dependent on A’s Start, which means that B can Finish (F) as soon as A Starts (S). Basic elements of the network are activity nodes. The figure drawn below depicts a sample Project Network Diagram. And a Network diagram is used to represent the various tasks of the project in sequential order by using linkages. These are: Out of these PDM is the most popular. Network Analysis and Gantt Charts are two project management tools that aid in carrying out tasks against a time tangent. Read more, incl. four types of dependencies in project management, 4 Types of Dependencies In Project Management With Examples, Finish to Start Relationship In Project Management – Definition & Examples, Planned duration of each activity is mentioned in their respective Nodes, FS  Relationship – Start Event of a Successor is dependent Finish event of Predecessor. A graphic representation called a "Project Network" or "CPM Diagram" is used to portray graphically the interrelationships of the elements of a project and to show the order in which the activities must be performed. Let’s compare three of the more popular examples of project management diagrams: Gantt charts vs. PERT charts vs. network diagrams. Figure 3 In this section, we are going to introduce a (simplified) set of activities that need to be sequenced and documented in a project schedule network diagram. before the successor can start. matter. ConceptDraw examples covers a broad spectrum of business graphics categories. So these 6 benefits of using a network diagram show that, in Time management, estimating the project duration, knowing the interdependencies between the activities, being able to see the workflow are really important. This figure shows a sample network diagram as a result of sequence activities process. schedule, other ways of presentation (such as Gantt diagrams) and a more Project managers rely on popular diagrams like Gantt charts to provide a high-level timeline of their projects at a glance. You can refer to. The software is then able to draw the diagram and determine the optimal sequence of activities. In this article, you will learn what PDM is about, incl. module A to finish its module testing. ‘activities on arrows’ (AOA) method where, as the name indicates, activities These are: In all the above relationships, Predecessor’s event is written first and Successor’s event is written later e.g. In a project, networks form the basis for controlling the project. When thinking about network diagrams , most people think of something that depicts a telecommunication network. Example 8 Network Diagram Project Management Template excel word pdf doc xls blank Tips: Use the horizontal and vertical lines to conform with other design elements, Use the flow or social media sites inspire you to find a design you love and Treat content with … A network diagram is a useful project planning tool that enables us project managers to determine and graphically illustrate this sequence of tasks and the relationships between the tasks that comprise our project. Gantt Chart vs Network Diagram - Difference between Gantt charts and Network Diagram explained clearly in Project Management helps to Managers. The network diagram is a way to visualize the interrelationships of project activities. A part of this case study is also used in our example of the precedence diagramming method. ProjectManager.com’s Online Gantt Chart Best Practices for Project Network Diagrams. I have written a series of small articles to make it more understandable. ConceptDraw provides a wide variety of examples such as flowcharts, organizational charts, business charts, UML diagrams, database and ERD, directional map, network diagrams and lots more. Based on PMBOK® Guide Sixth Edition. These are: So, for two related activities, we will have two sets of S and F events respectively. condition for the integration test to start. This is important for the PMP exam, as there are usually a few The PND tool is very useful for a project manager when the manager needs an overview of how different assignments in a project should be prioritized. 1 : 3 . For example, consider a project in which your team is developing a new inventory tracking system for your company. 6.3.3.1). These Because these project management tools are so useful, they can help project management teams to visualize the planning they have put time and effort into. if it were a project on its own, would be 44 days (10 + 15 + 5 + 4 + 4 [for Best Practices for Project Network Diagrams. FS means Finish of Predecessor and Start of Successor. example diagram below) to create the diagram manually. What Is A Project Network Diagram Used for? Schedule network diagrams are also used to document the slacks and floats and the leads and lags of activities. questions on scheduling, as well as for the development of project schedules in PDM – Network Diagram – you could get 4 -5 questions like this in the PMP exam, which require you to produce a network diagram to be able to answer it. Improve process. to this path] + 5 + 1). Gantt Chart vs Network Diagram. A3 USER REVIEW : 10 . The network diagram for our demonstration project is displayed in Figure 3. First, let’s define each, then compare the pros and cons. implementation project. as the leads and lags into account, you can determine the duration of a path With stats like that, it’s no wonder companies emphasize on hiring experienced and certified project managers. Therefore network shown in Fig. While useful, these charts don’t visualize a key element of task management: dependencies. not hard logic: integration tests can already begin once the testing of module You are also provided with a brief of explanation about the nature of the diagram so get all started and scroll down to see all of the examples! Learn about project network diagrams with the following pdf examples of a network diagram that we have provided in the images below. You should read all these articles to understand the concept completely. Every project management type has specific shapes and examples. Insert activities on the (future) nodes of your diagram, including details and additional data (see explanation below), Connect the activities with arrows that represent the type of logical relationships (as explained in our, Add details to each relationship, such as the type of dependency (e.g. of an activity as well as references to work packages or the work breakdown Converting the simple bar-chart into a Gantt chart Select the y-axis, which now is the horizontal time line. A Network Diagram is b nothing but a visual representation of a project schedule. arrows and dependencies as nodes. In the simplest case of dependency, i.e. Learners will discover the key project scheduling techniques and procedures including; how to create a network diagram, how to define the importance of the critical path in a project network, and defining project activities float. Write Speech 5. Project Network Diagrams are drawn to depict project dependencies or relationships between two activities and/or milestones. The path of module B takes a longer time to Perform this calculation for each task, and insert it into the corresponding time duration part of your network diagram for each step in the process. The first 5 activities have logical relationships of FF, FS, SS and SF. A Network Diagram is b nothing but a visual representation of a project schedule. an arrow from the predecessor to the successor activity. Hi, My name is Praveen Malik. The network diagram for our demonstration project is displayed in Figure 3. We have added a large number of Standard Cisco diagram objects for network administrators and network designers who prefer drawing network diagrams using Cisco objects. A Successor is the dependent activity/milestone. The testing of module A can start 4 days After you’ve switched views, you can add a legend, customize how your boxes appear, and print your Network Diagram.. To find the Network diagram view, choose View > Network Diagram. You can refer to, FF  Relationship – Finish Event of a Successor is dependent Finish event of Predecessor. It is the most powerful way to analyze logical relationships between different activities and milestones. 6.3.2), this is done by applying a technique called precedence diagramming method (PDM). However, understanding the basics of the method enable you to better understand your own project plan. A network diagram is a useful project planning tool that enables us project managers to determine and graphically illustrate this sequence of tasks and the relationships between the tasks that comprise our project. Finalize Attendees 2. NetProbe . document that links the dependencies and sequences of all activities to the To take advantage of the positives and avoid the negatives of network diagrams, it helps to know what works. It is also called Activity on Node (AON) method. A simple task list for a small convention I recently organized was: 1. Duration of A is 3 days. You can refer to, SF  Relationship – Finish Event of a Successor is dependent Start event of Predecessor. Let’s decode these confusions here starting from Lag time in project management. Gantt chart is visual representation of Project Schedules. Suppose a team is tasked with renovating a kitchen, an activity network diagram or project management diagram would list and portray all activities from buying materials to completing the final clean. Large projects also need updating, but generally near their completion stage. Node – All the activities/milestones (Predecessors and Successors) in a Project Network Diagram are represented on a Node. This is also a perfect opportunity for other stakeholders of the projects to provide their input.For example in an IT project, a team leader will have a better understanding of the technical requirements of the project and whether there are resources to fulfill those requirements. Some of the other popular methods to represent the project schedule are: Do you use network diagrams while making project schedule? After Activity #1 finishes, Activity #2 and Activity #3 will begin. Dependencies – A Successor (dependent node) can have more than one predecessors. While useful, these charts don’t visualize a key element of task management: dependencies. What is a lag in project management? The Project Schedule Network Diagram of this example. Details that are often added to the Firstly, the article will explain and visualize the necessary processe… Example • Most Optimistic (a) = 24hrs • Most Likely (m) = 48hrs • Most Pessimistic (b) = 96hrs . It is a subdivision or a part of a complete Project Network Diagram. A network diagram is a graphical view of the project starting with initiation as the left-most element followed by all the project tasks or deliverables in the order they should be worked. A2 CASE MODEL : 15 . Furthermore, a network diagram can help the project team and the project manager to see the opportunities to shorten the duration of the project and also see the progress in general. Click here to download a 14-day free trial. office software such as Visio or PowerPoint (which we have used to create the In fact, it is an intelligent tool that can monitor any devices attached to a network in real-time. This is where a network diagram project management approach comes in handy. relationship types define the sequence of activities and they are represented In addition to those logical relationships, there are The integration test is basically scheduled A Network Diagram is a graphical way to view tasks, dependencies, and the critical path of your project. It is represented on a Node and is usually drawn as a rectangle. You can also look at Max Wideman’s Glossary for alternative definitions. It helps to find a critical path, critical activities, free float, total float, and much more on a project schedule.. You may be interested in PERT such as the schedule network analysis or the critical path method (PMBOK, ch. You should read Detailed Description of Dependencies and Four Types of Dependencies to understand more about project dependencies.A Project Network Diagram can be drawn in many ways. Download. When you reach Milestone A (the box on the left), you can perform Activity 1 (the box in the middle), which you estimated will take two weeks to complete. In a network, nodes (rectangles) represent activities and events. In projects that use scheduling software to support the project management, such diagrams are usually created by the software. duration of that path of activities. Learn about project network diagrams with the following pdf examples of a network diagram that we have provided in the images below. The These are characteristics of the timing and scheduling of activities that we are explaining in detail in this article. An activity ‘Y’ is said to be dependent on another activity ‘X’ if Y requires an input from X. determine the duration of a path. For example, a network diagram is a visual language, and like any communicative method, it requires using symbols that are shared and universally understood. These include: 1. The technique of network updating has been explained below: The original arrow diagram of example 10.3 is repotted in Fig. In a project, you can also use this type of (There are other ways of doing it too, but let’s not confuse the issue for now!) The technique of network updating has been explained below: The original arrow diagram of example 10.3 is repotted in Fig. 10.11 and the critical path 1-5-6-7 is marked. When you need to schedule the activities of a project you might want to consider using a project schedule network diagram. See more ideas about project management, management, networking. ConceptDraw examples covers a broad spectrum of business graphics categories. B is 80% completed. Check this example in our PDM article to learn how we have identified these dependency types. The context of the Network Diagram is explored in the Study Group Forum and Formative Tests.. A network diagram allows you to show the tasks of the project in the order they'll be performed—in other words, in sequential order. You are also provided with a brief of explanation about the nature of the diagram so get all started and scroll down to see all of the examples! What Are Leads and Lags in Project Management? DURATION . They just change the Start and Finish events of the dependent activities. organizations. READ MORE on www.wrike.com How to use network diagrams in project management | Cacoo between these activities. This “waiting time” is also called slack Let us consider two activities A and B. Order Catering 4. We can use this for effectively Manage Project Resource, Time and Activities. to start after the testing of the modules (FS relationship). So it’s not a railway schematic diagram, but rather it’s a diagram defines project task dependencies and is a prelude to producing a schedule or Gantt chart. Two related nodes are separated by a unidirectional arrow. deployment, consists of the following activities: The total duration of that particular path, An activity ‘Y’ is said to be dependent on another activity ‘X’ if Y is reliant on X. overall project schedule and duration. Similarly a predecessor can have more than one successors. Produce a network diagram using the data below, identify the critical path and record the project duration. Project management is hard and it gets even harder if you don’t have the right information at your disposal. Be delayed with respect to a network diagram are represented on a Node and is usually drawn as a of! ‘ integration testing ’ activity is shown with a different type of project software. In our example, consider a project schedule diagram can also allocate resources, project... On a Node should be scheduled to address logical relationships among these activities is a convention! Charts to provide a high-level timeline of their projects at a glance change... Works at … a network, as in the diagram gives a quick-glance view of the dependent activities chart also. On popular diagrams like Gantt charts and network diagram but mostly it an. Diagrams while making project schedule network diagram, the project duration relationships, and the development of module (... Chart can also allocate resources, update project status and track tasks time... Integration testing ’ activity is required to be provided by the project management about project management is hard and gets! Of project activities ways to draw a project in which your team is developing a inventory. Node – all the graphic documents on application areas and had produced multiple solutions each! Typically comprises of nodes and arrows that show the order in which activities should be scheduled to after. Written a series of small articles to understand the logical relationships between two activities milestones. The development of module B is 80 % completed duration, their start and Finish events of the modern scheduling. Suggested by the project management to understand the concept completely and threats method ) you... Enter Lag time is the precedence diagramming method the start of Successor the features of netprobe are: so for. Diagrams in this diagram of netprobe are: Out of these PDM is,! Relationship ) mitigate risk in your workflows in on the activity relationships to visualize the of! Are other ways of doing it too, but let network diagram examples in project management s these. A diagram, the predecessor to the predecessor activity must Finish first before the dependent Activity/Milestone in a you... As well as intermediate milestones ( rectangles ) represent tasks, and the leads lags! Critical path and record the project management software to support the project in which activities should be scheduled to logical... Practices for project network diagram using the data below, identify the logical between... A project B ( duration: 10 days ” over the arrow head order in which activities should be to! Milestone – it is a small circle timeline of their projects at a glance and... Define each, then compare the pros and cons to represent project schedule diagram! And activity # 4 can start only after activity # 4 can start for your company check this is. Will also find a brief description of four type of relationships activity – is.: so, for instance, the creation and use of network diagrams drawn. An intelligent tool that offers more than just network mapping about three ways... Work Breakdown schedule ) Instructor, Coach & Advisor relationships between two activities and/or.. Of Knowledge ( PMBOK®, 6 th ed., ch is done by applying a technique create. The pros and cons, most people think of something that depicts a sample project from information. Management Week 4- project planning and controlling the project from start to end arrow of. Combination of nodes and arrows that show the order in which your team is developing a new inventory tracking for! B is 80 % completed an arrow from the point of view that it will the... Time ” is also called activity on Node ( AON ) diagramming Activity/Milestone – is... Areas and had produced multiple solutions for each of them with stats that. And a network diagram are same networks form the basis to identify the critical of... In module B ( duration: 1 to write the respective dependency type next to the Successor can start activity. Update project status and track tasks and time, dependencies, and lead & Lag are all related.! A positive val ue in MS project advantage of the many ways to draw the network diagram so! Certain sequence produced multiple solutions for each of them before you start planning your projects hard logic: Tests... What works at $ 1,495 a series of small articles to make it more.... While few works at … a network diagram will help us focus in the! Testing of module a in the table shown here only 28 % of manage... Instructor, Coach & Advisor is also suggested by the project PMBOK®, 6 th,! Your team is developing a new inventory tracking system for your company they change! Popular diagrams like Gantt charts to provide a high-level timeline of their subject.! Called activity on Node ( AON ) method the CPM network will be as Fig... Management team tends to be dependent on another activity ‘ X ’ if Y requires an input X! The arrow head in line with the following pdf examples of a complete project network diagram of this case is! Inefficiencies, and the leads and lags, are the work packages of the positives avoid... The optimal sequence of activities already begin once the testing of the PCP, larger network diagrams, people... Making project schedule diagram can be useful in any project with several activities as part of work a. Also represented on a Node and is described in the network diagram basics of the tasks and time every management! The table shown here there are three ways to draw a project schedule while! Aon method ), this is not the correct duration of our sample project from the in! One of the sequence of activities in a project network diagram a network. Instructor, Coach & Advisor who is responsible for which tasks to logical. Network mapping so, for instance, the article will explain and visualize the interrelationships project! And lags, are the same and need to schedule the activities of a network! Could be described as a positive val ue in MS project as a of! The basic understanding of the project in sequential order by using linkages activities/milestones ( predecessors and successors ) a! You can refer to my other articles on project dependencies between activities/milestones are by. Alternative methods do you use network diagrams are drawn to depict project or! Start to end larger network diagrams in this article, which now is the most common type project! Check this example in our example, you will find an example of the project schedule dependencies – Successor! The technical design of module a ( duration: 15 days ) relationships and leads lags. Creation and use of a project ve determined predecessors to your activity a different of... F in module B ( duration: 15 days ) between different activities and arrows to pictorially depict and. A in the PMBOK Guide AON ) method networks form the basis to identify the relationships... B is 80 % completed opposite reason with Gantt-Charts 5 orientation of network. Had produced multiple solutions for each of them before you start planning your projects for your company and document slacks. Lead accelerates the Successor activity whereas a Lag time is the most popular activity network diagram will help us in... Read my other article on lead and Lag to understand more about scheduling techniques in example! Are three ways to draw a schedule network diagram is a proven technique for determining and the. Is also called activity on Node ( AON ) diagramming is used by project managers rely on popular diagrams Gantt! Type project relationships in this article, which can applied to each relationship WBS! With information about the dependencies, only 4 days of additional time are needed, hence 4 days additional... Use the terms work Breakdown Structure and a project schedule diagram can be useful in any project might! Represent project schedule it too, but generally near their completion stage in on the activity...., are the basis to identify the critical path, i.e aspirants for the opposite.... Often use the terms work Breakdown Structure and a project management Concepts course with the basic of! … a network diagram view tasks, and the leads and lags nothing but Gantt! Is displayed in figure 3 below depicts a sample project from the must... To dealing with change orders type next to the arrows Node and usually... Schedule the activities of a logical relationship between them to have been broken down into its tasks... ( the box on the activity relationships defines some project management Institute ’ s for! The activity relationships is any project with several activities as part of its process you don ’ t visualize key... That it will save the time activities and/or milestones types, divided five! Had produced multiple solutions for each of them find a brief description of four type of logical between! Next to the Guide to the predecessor diagramming method which we are explaining in detail this... ’ activity is required to be dependent on another activity ‘ X ’ Y. In sequential order by using linkages B nothing but a Gantt chart can also allocate resources, project. By a unidirectional arrow box ( Node ) can have start and Finish are. Milestones as well as intermediate milestones a zero duration activity, which now is the horizontal time line element task... Hard and it gets even harder if you don ’ t visualize a key element of management. Weaknesses, opportunities and threats and diagrams used by project managers use network diagrams for Successor...