Schedule Compression - Fast Tracking vs Crashing - projectcubicle
Crashing is a schedule compression technique used to reduce or key is to attain maximum decrease in schedule time with minimum cost. PDF | Crashing is a resounding type of project schedule compression Keywords: Project Management, Critical Path, Crashing, Time-Cost Trade-Off 1. .. Plot the time-cost trade-off graph by linear interpolation between the. There are two ways to compress the Project Schedule (Time) without reducing the scope of the project: the Project Schedule Network Diagram and changing the relationship of activities on the You may also like: Part 4: How to Create PMP Study Plan? Crashing may increase the costs to the Project.
It is important to understand that you will review the activities on the critical path only, because on other paths, activities have floats. There is no need to shorten the duration of those activities; if you do so, you are only giving those activities more float.
Schedule Compression – Fast Tracking vs Crashing
However, you should check other paths whose durations are near the critical path duration, because if the duration of your current critical path becomes shorter than any other path, it will no longer be a critical path. If any other path has a duration equal to the critical path, it will greatly increase the risk for the project because you now have to manage two critical paths. Once you determine which activities can be fast tracked, you can start working on them to reduce the schedule.
The benefit of fast tracking is that it does not cost you any extra money; however, it comes with some increase in risks as you are now performing many activities in parallel which were originally planned in sequence. Here, both activities will be partially overlapped. Although it will increase the risk, the level of risk impact should be within acceptable limits. Fast tracking helps you reduce the duration of the schedule within limits. If you continue to fast track after this limit, it may increase the risk beyond acceptable levels and lead to possible rework or future delays.
Example Let us say that you are constructing a school building. Construction work is almost completed, and the next step is to start carpentry work, then electrical work, and so on.
When you review your schedule, you see that you are behind schedule. Therefore, you have to move faster so you can complete the project on time. As the construction work has been completed, you will review the carpentry and electrical work and see if these activities can be performed in parallel.
Once you have identified activities, you will apply fast tracking. In the given example, you will start the electrical work, and you will also call the carpenter to start the carpentry work at the same time. Crashing Crashing is another schedule compression technique where you add extra resources to the project to compress the schedule. In crashing, you review the critical path and see which activities can be completed by adding extra resources.
You try to find the activities that can be reduced the most by adding the least amount of cost. Once you find those activities, you can apply the crashing technique.
What is your best course of action? Since the project is delayed and you are under budget, you have enough funds; and so, you can crash the project to make up for the delay in the project schedule.
To avoid Penalty, which of the following tasks should be crashed to bring the project back on Schedule? Please refer to the table given below showing additional expenses that will be incurred when each task is crashed: Project Schedule has to be crashed to avoid negative float of 3 months.
If Customer wants to complete this project within 14 days, what would be the project float? The duration on the critical path for the Project is 18 days. If the project has to be completed within 14 days, the project float is - 4 days; i. So, Project Manager must either have the option to perform fast-track or crash the project schedule, if the project has a negative project float; i. The project XYZ has a project float of -3 months. Which activity or activities in the below table would you crash to save 3 months on the project XYZ.
How much would it cost to crash this project XYZ? The Option to save 3 months are: If you have negative project float in your Project, it means that the project is not going to meet its customer imposed deliverable date.
Fast Tracking Vs Crashing: Key Techniques for Project Schedule Compression | Project Management
Scenarios to use Fast-Tracking: The Project is behind Schedule. The customer has agreed on a revised delivery date for Project from Project Manager but the customer has not accepted an increase in the Project Cost. Fast-track the project by compressing the schedule without increasing and expanding the costs. Why is it important for Project Managers? You found that the Project is delayed, and it cannot be completed on time.
So, you have planned to get the approval from the management to change the relationship between several of the work packages, so that they start in parallel instead of sequentially. This is an example of? There are two activities with Finish to Start sequences. The duration of the first activity is 12 days, and the duration of the second activity is 10 days.
The estimated time completed for these activities is 22 days. The Customer asks you to complete these activities within 19 days; you review his request and agree to do so at no extra cost. Now, you plan to start the second activity three days before the first activity completes so that both activities can be completed in 19 days. This process is known as: In fast-tracking, those activities planned in sequence, performed in parallel or partially parallel to reduce the schedule.
You are the Project Manager for a Construction Project. You found that the project is delayed and decided to compress the schedule so that you can complete the project on time. You asked your team to perform both electrical and plumbing activities in parallel, instead of the plumbing activity starting after completing the electrical activity.
The action which you have taken is an example of?
Management asked you to fast track your project. You informed the management, that the consequences of Fast Tracking are: You determined that there are a number of activities in the Project Schedule Network Diagram, that can be performed in parallel by overlapping Finish-to-Start Relationships or making Start-to-Start relationships.
Which Schedule Compression technique are you using? As the Project is delayed and the Schedule Variance for the Project is. Fast Tracking Related reading: This article discusses the schedule compression techniques by focusing on the fast tracking vs crashing concept. What is Schedule Compression? Project managers and project teams seek the ways of catching the project schedule and complete the project on time.
However they are not successful in most cases because delays in the c ritical path trigger project delays. There are many schedule compression techniques used to reduce the project duration without changing the project scope. Common schedule compression techniques are crashing, fast tracking and resource reallocation. Simply put, these techniques can be used when a project; Falls behind the project schedule Needs to accelerate Needs to finish earlier than originally planned Fast Tracking vs Crashing In a project, delays may occur due to some reasons such as unforeseen events, unrealistic assumptions, weather conditions, mismanagement, insufficient resource management etc.
One reason to apply the schedule compression techniques is to mitigate the delays and catch up the project schedule.
Another reason is that sometimes project stakeholders may deliberately compress the schedule. Because they may expect cost benefit or bonus for completing earlier.Project Management - Crashing of a project - Concepts
Therefore they need some techniques to complete the project earlier. Fast tracking and crashing are the most widely used schedule compression techniques in project management.
What is Fast Tracking? Below figures illustrates two activities of a schedule. Activity A is the predecessor of Activity B. On the left side, there is a Finish to Start relationship between them and the Activity B will start after the completion of Activity A. Total duration is 10 Days.