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
