tasks - "Start to finish" dependency example? - Project Management Stack Exchange
Definition 5 A happening is the collection of action start and end points that occur at We enforce a strong mutex relation that guarantees non-interference and this results the limitations of the underlying computer systems supporting the construction The clip forces non-mutex action end-points in the original grounded. Finish-to-Start relationship is straight forward as most of the tasks fall under this . You would first finish construction and implementation of the new pipeline. Here's a sample of this chart in a residential construction project: The start and end date of each task; The relationships between . he used strips of paper stuck on a board with clips to represent the duration of each task.
Start to Finish Relationships — to use them, or not? August 5, By TheP6Pro Of the four standard activity relationship types you can define in most half decent scheduling tools, the Start to Finish relationship is the least used, but the one responsible for most of the puzzled looks I get when training new schedulers.
Project and Portfolio Management. Activity B can be: Activity A can be: B must continue as long as A has not started. It is not necessary that B finish once A starts, but it is allowed to finish once A starts.
Making such a link between these two example activities is easy enough. And indeed here it is, as performed in Primavera P6 Professional. The following figure shows the Start to Finish link on the A and B example. I think further confusion comes when thinking about SF linked activities in context with other preceding or succeeding activities. It can be hard to grasp what a Start to Finish link is buying us in terms of how the critical path will be affected and how these predecessors and successors will be impacted.
And my research uncovered no practical discussions of SF relationships in the context of a true scheduling situation.
For now, both the activities are sitting back on the Data Date because they have no other predecessors.
Back to Basics: Understanding task dependencies
Nothing has been moved when the schedule was calculated because activity A is not dependent on the longer duration activity B. In order to power up the lines, there must be some effort to get the cable run from the power grid to the site.
So this would precede the Turn on Power Line to Site activity. Finish-to-finish dependencies don't require that both tasks be completed simultaneously.
They simply require that the first task be finished, in order for the second task to finish. The second task can finish any time after the first task finishes. In our wedding cake example, let's say there are some finishing touches to the decorations that you can't finish until the cake is delivered. You can use a finish-to-finish dependency between the "Decorate cake" and "Deliver cake" tasks.
Start to Finish Relationships - to use them, or not?
When the "Decorate cake" task is finished, then the "Deliver cake" task can be completed. Finally, the start-to-finish SF dependency is a little tricky.
When you use this type of dependency, you are saying that the second task in the relationship can't finish until the first task starts. However, the second task can finish any time after the first task starts. Going back to our wedding cake example, let's say you have a task for billing the customer.
It begins when the customer requests the cake, but it can't be completed until after the cake delivery has begun. Discretionary dependencies also referred to as soft logic are the ones that result from a preferred method or best practice of carrying out an activity. It is worth mentioning that this type of dependencies can result in different type of relationships based on the setting of the project.
For example, in Design-Build projects the design of a building can be finalized before commencing the construction or the construction can start before the final design is still in progress. External dependencies are the ones that are forced by non-project activities yet they are necessary for the start of project activities. In some situations, the project team have no control over these dependencies.Project Activities - Logical Relationships and dependencies (FS, SF, FF, SS)
For example, a contractor cannot start the construction of a building before issuing a construction permit non-project activity.
Sometimes it is necessary to use lead or lag time between activities to maintain an accurate logic between activities. This will be the topic of a future post. Please feel free to comment of give a feedback on my post. Bibliography Project Management Institute. Project Management Institute, Inc.