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Introduction to Critical Path

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Construction Scheduling

Columbia University

4.8 (942 Bewertungen) | 12K Teilnehmer angemeldet

Kurs 2 von 4 in Bauwesen-Management Spezialisierung

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. 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.

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Kompetenzen, die Sie erwerben

Schedule, Linear Scheduling Method, Program Evaluation And Review Technique (PERT), Critical Path Method

Bewertungen

4.8 (942 Bewertungen)

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GJ

Sep 28, 2019

This course is dedicated to anyone in the construction management industry and/or the willingness to learn about construction management. I will highly recommend this course!

BA

Mar 16, 2019

It was a very dynamic course which contained many useful knowledge. I gained many important information that will help me a lot.\n\nThanks to Coursera and to my Instructors.

Aus der Unterrichtseinheit

Critical Path

Professor Odeh discusses the importance of critical path in this module including what it is and why it is important. Learners will identify a critical path in a project and how to determine a critical path in different relationships.

Introduction to Critical Path5:44

Critical Path in a Project Schedule10:02

Determining the Number of Critical Paths in a Project2:09

Imposing Lag Durations in Critical Path12:14

Determining Critical Path in a Start to Start Relationship7:26

Determining Critical Path in a Finish to Finish Relationship6:57

Unterrichtet von

Ibrahim Odeh, Ph.D., MBA
Instructor, Department of Civil Engineering and Engineering Mechanics, Columbia University

Skript

In this module we will be talking more about the critical path and highlight why it is important and how to use it. And try to work together on how to identify the critical path or paths that we have in your project. So before we move forward, let's study this project that we covered in a previous module that focusing and calculating the forward and the backward past calculations, or the CPM forward and backward task calculations. If you remembered, we had the following activities. And I want you to look at what sequence of activities or how many sequence of activities we do have in this project. If you would notice here we do have activity A, B, E, and G. This is one path to go through the entire schedule of the project. Another sequence of activities to go from the start to the finish of the project would be A, C E and G, this is the second path. A third path will be A, C, F, and G. And the last path we can go from start to the finish of my project here would be A, D and G. So if I ask you to calculate the duration on all of these path, we get the following. ABEG will have 18 days long, the total duration of that path, the ACEG 15 days, ACFG 12 and ADG is 15. So the longest path duration we have would be A, B, E and G of 18 days. All the other activity sequence from the start to the finish of the project will generate, as we see here, a shorter total duration. Also, if you recall by performing the forward pass calculations, we can find the duration of the project. However, the backward pass calculations make it easier for us to identify the longest path of activities at our project, as we saw here. Moreover, we notice also that all activities that are at the longest path has an early start equal its late start, or its early finish equal the late finish. Let's take an example here. The longest path here is what A, B, E and G. The early start for A is 0, the late start also is 0. Early finish is 1, the late finish is 1. Activity B, 1 equal also 1, the early start and the late start. The early finish equal the late finish. Activity E also 10, 10, 17, 17. The last activity on that longest path we have 17 equal 17, the early start equal the late start and the early finish equal the late finish. If you notice all these activities has the same property, so the focus here is that the with the maximum total duration is called the critical path of your construction project. And its activities also called critical activities. This critical path is very important when it comes to control your construction of project. Also, understanding its implications is very essential for a rational management decisions. So again, if I want to define it, that critical path, there is different definitions. But the main definition I want you to remember and take out from this course is the path with the maximum total duration in your project. Now let me explain in more details about some properties of critical path and to also come into conclusion why it is important. So here we highlighted this is the critical path in yellow.

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