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For the sake of conciseness, we will only sequence the followingĭesign and development activities for 2 modules: Involves designing, developing, implementing, testing and deploying an IT The first 4 activities and durations in this example are consistent with the example presented in our article on leads and lags, so you can compare the results and differences between both techniques. As for many project management techniques, PDM as a methodĬan be applied to almost any kind of project.
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However, you can replace the IT-related aspects with activities from otherĪreas such as construction, research and development, strategy development and
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Example of Precedence DiagrammingĮxample of PDM modeling refers to a fictional software development project. In practice, this type ofĭependency does not occur very often which is also acknowledged by the PMBOK. Logical relationship requires that a predecessor activity must have startedīefore the successor activity can be finished. The predecessor activity must have started before the successor activity can Of dependency can also coincide with start-to-start relationships of the sameĪctivities are connected through a start-to-start dependency, this means that
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Type of logical relationship, a successor activity requires the predecessorĪctivity to be finished before it can be completed. Predecessor activity must be completed before the successor activity can start. Finish-to-StartĪctivities are linked by a finish-to-start dependency, this means that the Learn more about leads and lags in this article. If activities can start earlier or need to be delayed in a sequence, so-called leads and lags need to be incorporated. Logical relationship the more important one should be prioritized to avoid complexity If activities are linked through more than one In the next section, we are sharing an example of these Read on for a definition and illustration ofĮach of these types. You can memorize the concept as follows: The first part (‘finish’ in ‘finish-to-start’, for instance) refers to the status the predecessor activity must obtain for the successor activity to achieve the status expressed in the second part (‘start’ in FS). Of logical relationships in the precedence diagraming method are: This is similar to the activity-on-node orĪctivity-on arrow method yet more flexible as it allows overlaps of activities These dependencies form theĬonnection between successor activities and predecessor activities which are – that are introduced in the next section. The identification and visualization of the sequence and dependencies ofĪctivities in a project or a part of a project, such as a workstream or a work package.Ĭan reflect 4 types of dependencies – also referred to as logical relationships The precedence diagramming method can be used for creating a project schedule network diagram which is an output of this process that is used as an input for the ‘develop schedule’ process ( PMBOK, ch. PDM is a scheduling technique of the ‘sequence activities’ process in PMI methodology.