Intro:
I was constantly asking myself, why line of equilibrium approach is not commonly utilized in building and construction tasks? I recognized that since it is generally made use of in the repeated tasks such as roadways, pipes, as well as various other tasks with much less reliances.
I saw couple of charts of the organizing utilizing Line of Balance as well as the initial impact was it looks made complex. Appropriately, I chose not to continue as well as examine additional regarding this preparation method. Throughout one of my training sessions with brand-new designers, we talked about the line of equilibrium approach, and also I asked them to describe it to me as they recognize.
To be truthful, now my details regarding the LOB technique was really common as well as I never ever believed maybe a beneficial preparation technique.
Remarkably, the fresh designers described this approach to me and also I located it is extremely straightforward. I begin assuming and also looking into exactly how we can utilize this easy technique in our difficult tasks? There are some software program like TILOS which take care of LOB technique in a similar way to Oracle Primavera which takes care of Critical Path Method (CPM).
I desired to begin my examination utilizing my preferred preparation device Microsoft Excel. Appropriately, I wish to show you my lead to this post, the application of LOB approach in building tasks making use of Excel device.
What is Line of Balance (LOB) Planning Technique?
According to esigning Buildings Wiki (2017 ), “Line of equilibrium (LOB) is an administration control procedure made use of in building where the project consists of blocks of recurring job tasks, such as roadways, pipes, passages, trains and also skyscrapers.
LOB gathers, actions and also offers info connecting to time, price and also conclusion, and also provides it versus a particular strategy.”
According to my understanding, LOB is an extremely basic approach, it transforms the days right into lines, you require to keep these lines not went across as well as close to each others as you can.
Allow us begin with this instance. We have 10 comparable structures, as well as we intend to develop the routine making use of line of equilibrium approach.
LOB Step one:
We will certainly attract the Plain concrete jobs under grounds, each structure will certainly take 10 days to be finished, so it is an easy procedure.
LOB Step 2:
The X Axis stands for the system number, and also the Y Axis stands for the moment. Currently we understand each device when the COMPUTER under grounds need to begin as well as when it must end up. Device No. 7 must begin in 31-May-17 and also must end up 9-Jun-17.
Currently we wish to include the strengthened concrete for grounds, yet it will certainly take 15 days to finish one device. Right here is the initial duty for LOB approach, if the follower task takes longer time for implementation, after that begin from base.
In our situation the enhanced concrete for grounds must begin quickly after the Plain concrete surface. I.E 11-April-17, see the Line of Balance chart listed below after including the strengthened Concrete for grounds.
LOB Step 3:
Ok, currently we wish to begin the structure waterproofing, as well as allow us presume that a subcontractor will certainly involve do it for us, yet in the subcontractor agreement, the system will certainly take just 3 days to complete as well as if the job is not readily available, the subcontractor will certainly assert still time.
The inquiry below, when the subcontractor should begin to preserve continual job without standstill? This is among the primary advantages of the Line of Balance Method, in this situation we will certainly begin our computation from the top.
I.E we will certainly begin with when the waterproofing job need to complete as well as make backwards computation. In our instance, the waterproofing needs to end up after the last system of the RC structure surface + waterproofing period = 7-Sep-17 + 3 days = 10-Sep-17. See the number listed below to recognize just how it will certainly resemble.
LOB Step 4:
As you can see, the best beginning timing (LOB) for the waterproofing sub-contractor is 12-Aug-17, this will certainly guarantee the job connection as well as will certainly complete after the last device structure.
This is wonderful, however not sensible, it does not make any kind of feeling to wait 109 days (in between very first device RC conclusion as well as initial device waterproofing beginning).
Building and construction tasks are quick as well as we intend to begin the follower tasks such as back loading, columns and more.
We can get to a contract with our subcontractor (If appropriate) to function in spots. Allow us state, 3 devices, 3 devices, and also 4 devices. Because instance, we require to customize our line for the waterproofing according to the complying with graph.
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