costing for civil engineering project
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COSTING FOR CIVIL ENGINEERING PROJECTS
UNIVERSITI MALAYSIA SARAWAK
Faculty Of Engineering
KNS 3333 CONSTRUCTION TECHNOLOGY
COSTING FOR CIVIL ENGINEERING PROJECTS
Cost
RateCost Estimating
Methods
Quantity
Cost
What is Cost ?
An estimate how much money will be neededor price to be charged for something.
(Oxford Advanced Learner’s Dictionary)
Why Cost (Control) Is Important?
Inception Design
Preliminary cost
estimate
Comparative cost estimate
Alternative materials
Form of construction
Tender Construction
Planned profits achieved ?
Feedback for future cost estimating available ?
What corrective action to be
taken ? Within economic limit of expenditure ?
Pre-contract Stage Post contract Stage
Quantity Rate AmountX
How Costing Is Done?
=
Quantity?
What is Quantity ?
The measurement of something by statinghow much of it there is.
(Oxford Advanced Learner’s Dictionary)
How quantity is read?
Quantity is shown as a figure and a unit of measurement behind it.
800 M
Unit of measurementQuantity
Quantity
Area (M2)
Weight (Kg or Ton)
Length (M)Volume
(M3)
OthersHours or
Day
Unit of measurement
Rate
What is Rate?
A fixed charge, payment or value.
(Oxford Advanced Learner’s Dictionary)
What is Rate?
Price per unit of measurement.
RM 250.00/M3
Per unit of measurement
Currency
How rate is read?
Price of item
Material CostWastagesPlant Cost
Labour CostProfit & Overheads
Rate Build Up
Example Of Market Rate
Description Unit Rate (RM)
Excavation (pit) M3 10.00
Concrete Grade 15 M3 240.00
Concrete Grade 20 M3 255.00
Concrete Grade 25 M3 270.00
Formwork M2 28.00
Reinforcement Kg 3.20
Rate will differ from one project to another due to various factors such as size, nature of work, location, market conditions, etc.
Cost Estimating Methods
Notes On Costing For Civil Engineering Projects
Involve large amount of uncertainty owing to
nature of ground conditions, temporary works, etc.
Notes On Costing For Civil Engineering Projects
Bill of quantities comprise large quantities of comparatively few items.
Quantities usually approximate and
remeasurement required when work is actually carried out.
Different method of measurement is used for civil engineering works (CESMM).
Notes On Costing For Civil Engineering Projects
Costing can be carried out by breaking
down works into smaller cost items and price the quantities against a rate.
Notes On Costing For Civil Engineering Projects
Costing similar to building works but more
towards method of construction rather than material cost.
Cost Estimating Methods
Unit Method
Standard Unit Of Accommodation
Appropriate Cost Per UnitXEstimated
Cost=
MidLow High
Cost Estimating Methods
Superficial Method
Area Of FloorsCost Per
Square MetreXEstimated Cost
=
MidLow High
Cost Estimating Methods
Approximate Quantities
Items Of Major Cost Importance Measured Only
Unit RateXEstimated Cost
=
MidLow High
Build up on basis from cost database price book or priced BQ
from previous project
Cost Estimating Methods
Bill Of Quantities
Measured Quantities
Unit RateXEstimated Cost
=
MidLow High
Build up on basis from cost database price book or priced BQ
from previous project
Pre-Tender Estimate to include other items like
Preliminaries, Provisional Sums, Prime Cost Sums,
Contingency, etc.
Cost Estimating Methods
Type of information provided
Quality of relevant available pricing information
Experience
Skills
Degree Of Accuracy
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