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5 Benefits of Construction Estimating


Today, construction estimating software is giving forward-thinking building companies an edge over their competitors. The benefits of an efficient estimating solution are comprehensive, but here are our top five. – PowerPoint PPT presentation

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Title: 5 Benefits of Construction Estimating

4 Common Estimating Methods Used by Quantity
Surveyors and Construction Cost Engineers   
Unit Method
  • This estimate is done in the early stages when
    design plans are not available. The Estimator can
    work out a rough figure based on the number of
    personal units required by the client
  • Number of Personal Units x Cost Per Unit Total
    Cost of Building
  • These personal units come in various forms. They
    can be
  • The number of people who will occupy the building
  • The number of rooms or bedrooms in a building
  • The number of desks in a classroom
  • The number of keys or beds in a hotel
  • The number of beds in a hospital
  • The number of parking bays in a basement car park
  • The number of cows on a dairy farm facility
  • The number of beds in a prison
  • Number of tables in a restaurant
  • Number of stalls in a marketplace
  • Number of seats in a movie theatre or cinema

Floor Area Method Once sketch designs with floor
areas are available, the Estimator can measure
the internal gross floor area of the building and
multiply the same by the construction cost per
m2. According to data provided by local
municipalities, building societies, property
developers and consulting quantity surveyors, the
construction cost per square metre differs by
region, location and type of building.   
Estimate This estimate requires more
information other than floor areas. To use this
method, drawings with enough information are
required i.e. wall elevations, structural frame,
roof structure, ceilings, foundation cross
sections, floor construction, external works,
wall and floor finishes. The document contains
detailed information broken down into Building
Elements. A project can have up to 21 Building
Elements depending on the specifications and
scope. To calculate the total cost, the Quantity
Surveyor has to price the component items which
are grouped together based on similar areas or
length. An elemental estimating guide with
measurement rules has to be followed. 
Quantities This estimate requires advanced
drawings because sufficient information is
required for building up composite rates. Its a
faster method of producing un-standardized Bills
of Quantities, although its not really a BOQ but
an approximate preliminary estimate. In this
method, the Quantity Surveyor combines items from
a Bill of Quantities into groups that can be
quickly measured using the Group unit of
measurement. A composite rate is created for each
group, and thus this estimate takes a long time
to prepare than other methods, although its a
more reliable estimate. The total cost of a
project is obtained by adding up the subtotals of
the groups.

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