ENGINEER| ARCHITECT|HOW TO CONSTRUCTION COST ESTIMATION

ENGINEER| ARCHITECT|HOW TO CONSTRUCTION COST ESTIMATION


Construction estimators use building plans,
project specifications, and information obtained with site visits
to estimate the cost of completing a Construction Project

ENGINEER| ARCHITECT|HOW TO CONSTRUCTION COST ESTIMATION

CONSTRUCTION COST ESTIMATION


Contractors evaluate a project's plans and specifications to create a Construction Cost Estimation. This is traditionally done by analyzing the project plans and, utilizing knowledge of proper construction methods, producing an itemized list of the project requirements. Then, based on this list, a contractor will arrange the various resources and costs for every aspect of building and so gain a Construction Cost Estimation
                                  
In this step, we are going to analyze the Itemized offer, we will make a careful analysis of essential activities for each task of the new Construction Work
A popular and usually implementation  is dividing the tasks of Construction Work, accord to the different specialities, for example,
SPECIALITIES- CIVIL  -PIPING AND EQUIPMENT - ELECTRICAL -INSTRUMENTATION AND CONTROL -  PRE-COMMISSIONING AND COMMISSIONING
Then divides each skill at different tasks and these at different sub items. ( For small works, these tasks can being do with only one person that has a large experience at Construction work)  Examples of  Construction Cost Estimation for:

A- SPECIALITIES CIVIL
A- 1 BASE OF REINFORCED CONCRETE (TASK)
A -1-1 CUTTING, FOLDED and ARMED OF STEEL (sub item)
A -1-2 CONSTRUCTION and ERECTING OF FORM WORK (sub item)
A -1-3 FILLING OF CONCRETE (sub item)
A -1-4 REMOVAL of FORM WORK and CLEANLINESS (sub item)

B- SPECIALITIES PIPING And EQUIPMENTS
B -1 SUBTITLE  PIPING (TASK)
B -1-1 PREFABRICATED PIPING  (sub item)
B -1-2 TEST HYDRAULICS OF SPOOL (sub item)
B -1-3 PAINTING of SPOOL (sub item)
B -1-4 MOUNT OF SPOOL, SUPPORTS And STRETCHES OF ADJUSTMENT (sub item)
B 1-5  HYDRAULICS TEST PIPING (sub item)

C -SPECIALITIES ELECTRIC
C -1 PIPING CANALIZATION (TASK)
C -1-1 EXCAVATION (sub item)
C -1-2 MOUNT OF PIPES (sub item)
C -1-3 CONSTRUCTION And CONCRETE FILLING (sub item)
C -1-4 CABLING -IDENTIFICATION and CONNECTING of CABLES (sub item)
We suggest at payroll quantity of each sub item, the yield, in man hours for a unit of measurement (affected for the characteristics of this work), the cost of the man hour (including social loads) and the cost of the material for a unit of measurement, adding the lost by wastes and transportation cost, in order to obtain the total unit cost of material and man hours of work for a unit of measurement of each sub item:
For example, Construction Cost Estimation for Reinforced Steel

A-1-1 CUTTING, FOLDED and ARMED of STEEL




The payroll  Excel is built once only, and it is used for all the works, adapting it to each work in particular.
Excel is not mistaken and besides it allows changing any compute rapidly
This payroll should be correctly constructed at the Company and besides having placed the yield in Hours/Unity (later on we will ensure that we have to use a correcting factor to the yield of the staff according to the conditions in which generate the works  )
As to the expense of Hours is appropriate that the Bookkeeper section indicates the value, since slight variations can do that one bag or lose a job
The rest is a responsibility of the reviewers that should be extremely careful
In the next entrance, we will see what's relevant to the need to make an initial programme of works, the estimate of the Financial Cost of the work and analysis of the Cost for Insurance resource for make an exact Construction Cost Estimation


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