F205PCC Project cost and control
- Created by: John Beare
- Created on: 28-01-13 00:05
The cost control process of a project at design stage. (forecasting and controlling)
Procurement straregies for projects.(contractor selection techniques)
The cost control process of a project at design stage. (forecasting and controlling)
relationship between the RIBA plan of work and pre contract cost control processes
A APPRAISAL order of cost estimate
B DESIGN BRIEF Collation of cost data
C CONCEPT Formal cost plan 1 (elemental cost plan based on group elements using GIFA m2)
D DESIGN DEVELOPMENT Formal Cost Plan 2 (elemental cost plan based on EUQ)
cost planning - The cost plan prediction is usually taken to be a a 'fair price for the work'
- ensure the sum of money the client sets out is not exceeded.
- client obtains good value for money
- provides cost information based on proposals by client and designers
- provide advice resulting in balanced expenditure
- provide cost information to allow for informed decisions
- avoids difficulties and complications which arise when tender exceeeds estimates
in practice:
- cost planning does not allow for different architects preferences or contractors estimating practices- these are unknown to the cost consultant.
- more reliable estimates of costs can be acheived if based on costs known to consultant and the architect is well known.
- difficult to predict future price changes
- costs expressed per m2 of GIFA are not helpful of decisions based on quality. unit quantity prices (cost per m2 windows) are better understood
- decline in bills of quantities may lead to a lack of suitable analyses.
sources of cost information
- priced bills of quantities (although in demise)
- final accounts
- Prepared cost analyses based on tenders and final accounts (most reliable) due to factors encountered
- Price books
- Analyses published in trade and professional journals
- cost indices
- special information based on cost trends published in periodicals
Design and site factors that impact cost of a project, appreciating effects on different types of buildings; impact on the element and buiding as a whole
factors that influence cost of a building (consider and explain the impact on costs on elements affected):
- Design
- Plan Shape - changes in shape have little impact on floor area, the changes in perimeter length will affect external walling, foundations, eaves construction and detailing, heat loss and gain- and therefore elements associated with heating/air conditioning.
- Grouping of Buildings- saving in combined use of seperating wall over external walls,
- depth of floor joists may alter de/increasing height of building (slightly)
- lengths of eaves and gutters change - ammount of downpipes
- storey height; impact of increasing storey height eill be on vertical elements, walls, partitions, finishing and decoration, stairs, services (not always proportionately- eg lift car). increased volume will impact heating requirements (plantsize/additional cabling ducting; additional strengthening of foundations
- size of building, cost does not rise in proportion to increase in size of a building, large buildings, consideration needs to be applied to special requirements of services
- circulation space consists of entrace halls, corridors, staircases etc, important factor of design; lettable floor area is less space taken up by circulation space (which needs to…
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