8-Cost Control
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Transcript of 8-Cost Control
1
“Methods of “Methods of
Measurement”Measurement”
byby
Prof. Indrawansa Samaratunga Prof. Indrawansa Samaratunga PhD, DSc,PhD, DSc,
FRICS, FAIQS, FIQS(SL), FCIArb, FCIOB, FCMI, FIAS, FBEng,FRICS, FAIQS, FIQS(SL), FCIArb, FCIOB, FCMI, FIAS, FBEng,(Arbitrator & Expert registered with Dubai International(Arbitrator & Expert registered with Dubai International
Arbitration Centre/Chartered QS/Chartered Manager/Chartered Builder)Arbitration Centre/Chartered QS/Chartered Manager/Chartered Builder)
Australian Institute of Quantity Surveyors Australian Institute of Quantity Surveyors –– Middle East Representatives Middle East Representatives
CONTROL
FORECAST
Time Clause 14 Programme
Specifications/Drawings/Standards
Priced Bill of Quantities
Quality
Cost
Standard Methods of Measurement
SMM7 Standard Method of
Measurement of Building Works : Seventh Edition. (NFBTE/RICS)
Principles of Measurement
(International) for Works of Construction. (RICS)
Civil Engineering Standard
Method of Measurement 3rd Edition. (ICE)
POM(I)
CESMM3
2
Objects of the
2.4 The objects of the Bill of
Quantities are :
(a) to provide such information
of the quantities of
work as to enable
tenders to be prepared
efficiently and accurately.
(b) when a contract has been
entered into, to provide
for use of the priced Bill
of Quantities in the
valuation of work
executed.
- CESMM3
Bill of QuantitiesMethod of
MeasurementThe object of a good method of
measurement is to set forth the
procedure/rules according to which,
the Bill of Quantities should :
(a) describe as accurate (but as
simple and brief) as
possible, the work to be
priced.
(b) distinguish between items of work
of different nature, and
between work of same nature
but having different cost
considerations.
(c) allow for separating any costs
not proportional to quantities.
Unit Rate AmountQuantityItem Description
Supply, deliver, cut, bend and fix in position, 20 mm diameter plain round mild steel bar reinforcement complying with BS 4449,
Reinforcement; plain round steel bars to BS 4449; nominal size 20mm.
including supports and cleaning where necessary.
20 mm diameter plain round mild steel bar reinforcement complying with BS 4449,
0.40 m
0.40 m
0.20 m
0.80 m
Concrete 0.4 x 0.4 x 1.0 = 0.16 m3 Concrete 0.2 x 0.8 x 1.0 = 0.16 m3
Formwork (0.4 + 0.4 + 0.4)x1.0= 1.20 m2 Formwork (0.8 + 0.2 + 0.8)x1.0 = 1.80 m2
BOQ Compilation
Taking-off Measuring quantities from Drawings/Schedules/Models/Surveys and writing abbreviated descriptions
Arranging quantities trade by trade
Preamble, bill arrangement, headings/sub-headings/common descriptions etc.
Working-up (Abstracting)
Bill writing
Studying documents (including MM), site visits, discussions with design team, queries/clarifications, planning
Preparation
Double check major quantities.Checking
All worked documents/assumptions.Archive
Unit Rate AmountQuantityItem Description
Reinforcement; plain round steel bars to BS 4449;
A
B
C
kg
Kg
T/t 1.243
nominal size;
20 mm.
12 mm.
6 mm.
B20 Paving and surfacing
B20.1 Paving and surfacing shall be measured
by area.
B20.2 Expansion joints and water stops shall be
measured by length.
B20.3 Channels, curbs, edgings or the like shall
be measured by length; curved work
shall be so described.
- POM(I)