Activities in a Construction Project

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Do curso por Columbia University

Construction Scheduling

515 ratings

Columbia University

Construction Scheduling

515 ratings

Curso 2 de 4 em Specialization Construction Management

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.

Na lição

Types of Construction Activity Relationships

This module provides an overview of the types of construction activity relationships encountered in a construction project and how to represent them in an activity precedence diagram.

Activities in a Construction Project6:01

Types of Relationships between Construction Activities7:15

Start to Start Relationships7:49

Finish to Finish Relationships4:13

Multiple Relationships3:53

Conheça os instrutores

Ibrahim Odeh, Ph.D., MBA
Instructor, Department of Civil Engineering and Engineering Mechanics, Columbia University
Director of Research and Founder, Global Leaders in Construction Management

For this module, I will be explaining to you the types

of Construction Activities Relationship that we

might face in any construction project that we deal with or work at.

If you remember, in other module that's focusing on the activity on node,

we highlighted that activity on node showing a graphical tool

that shows a projects activities as rectangles or

squares join by arrows including the relationship and

the between these activities, as we can see here.

So, from that side we mentioned that a node

network diagram uses four types of construction activities relationship.

From finish to start, from start to start, from finish to finish and

start to finish or multiple relationship.

So, what we discussed until today and most of the examples we

gave was mostly focused on a situation in which the end of an activity

is in necessary condition to begin a successor.

For example, the end of activity B is necessary to begin

activity D or F or S on another word,

let's say activity E will not start until activity C finishes,

this kind of relationship called the Finish to Start Relationship.

And this also refers to as the traditional relationship,

in a matter of fact most schedulers,

they do prefer to only use this relationship when building their schedule.

So, before I go deeper and dig deeper on the top of the relationships,

I want to highlight something what we call the key.

So for example, we have a construction activity of pouring a concrete.

As we can see here we explain as a rectangle shape.

You will noticed on your schedule and sometimes from softwares they developed

the activity with something not just the name of the activity or

the description of the activity but also more numbers in the rectangle

that highlight more information about that specific activity.

And before you read your schedule, you look for

that key to highlight what are these numbers.

So for example, I highlighted a quick example for you.

If we have poor, incomplete activity, the description,

what we usually put here is the name or describing of that activity.

So that in this case would be pouring concrete.

Activity ID is basically a number or

that activity number in the list of activities you have in your project.

And we covered that in the previous course on project initiation and planning.

That refers what's we mean by the.

And then, another number could be referring to the duration of

that specific activity, could be in days, in weeks and months

and then these four I highlighted here just I'm going to with them very quickly.

One is the ES, refers to the early start of that activity,

when that activity can start.

The earliest possible time it will start.

The same thing goes to EF which is when that activity that early finish time for

that activity.

The difference between the Early Start and the Early Finish,

it's always has to be the duration of that activity.

LS on the other hand, it refers to the latest start.

What's the latest time that activity can start?

And sometimes we mention that, or we need that number on what's the latest time

an activity can start without affecting the project end date by any chance.

This we will be talking about in much more details for other modules

later on how to calculate all these numbers and why they are important.

Last but not least we can have something called LF, for

example which is the Late Finish.

What's the latest time that the activity can finish without

affecting the end date of the project to be shifted.

Sometimes you might find more information below this rectangle, and other,

maybe small, two rectangles or three highlighting the type of

which we will also be discussing in a separate module in this course.

So, I just want to highlight quickly what's the key before we

dig deeper into the touch of the relationship, so as you can now relate in

the examples that we will be giving you now in all of the times.

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