Tackling the Assignment

GROUP 3 – B.J. DAYAL, F.A. GRADINARU, P.I. IPIPI-AMANI,

R.J. MANNING, M.S. ROBERTS, M. VAHORA

Time Frame Breakdown

2.01 Research till 11 May

2.02 Cost Modelling Definitions & Explanations till 25 May

3.01 Green Buildings Definition till 1 June

3.02 “Green” Impacts till 8 June

3.03 Summary and Final Report 17 June

4.01 APA referencing as you go.

2.02 Cost Modelling Definitions & Explanations

Defining what is meant by the term Cost Modelling. Searching through a variety of textbooks reveals different definitions,

an example definition is:

“the process of working out a ballpark figure to establish if the project is feasible, and then refining this estimate as the design develops” (Kirkham, 2014, p.7).

 

Using above definition we can work through an actual scenario to demonstrate the definition and explanations.

Further online research found an example of how RIBA break down the plan of work into 7 phases.

2.02 Cost Modelling Definitions & Explanations Example

The client wants to build a new building, he has budgeted an amount but how much will it actually cost?  We could start by describing the “functional unit” method of pricing which is used in phase 1.We could then move on to phase 2 where we use the information we have obtained on what cost modelling is and how it is used to test the phase 1 estimate. The outcome of this could be:Alternative construction methods can be looked at eg concrete v steelIs it higher because the client made changes – these must be costed to arrive at a new estimate.Have costs escalated since the start of the project – cost data can be obtained Stats NZ for capital goods and labour.

2.02 Cost Modelling Definitions & Explanations

Key Concepts  Cost analysis- The breakdown of tender cost data into standard elements

of a building. These costs are usually expressed in units such as cost per square meter of GFA or in an elemental quantity.

Cost Planning – This is the method of controlling the cost of a project within budget up to the tender stage. It is based around accurately measuring and valuing the cost of work once design is completed but before it is executed.

Project Cost Estimating – Involves choosing an appropriate cost model and applying it to the project. At inception cost models are used to formulate budgets or as a target for testing feasibility and financial planning.

Cost Models are used in evaluating major alternatives in the early stages of design through to the evaluation of detailed design specifications as decisions are made and building design progresses.

2.02 Cost Modelling Definitions & Explanations

Modelling Methods Unit Method- Simplest method where a functional unit standard for

the project is selected and multiplied by the estimated cost per unit.

e.g Hospitals per bed, schools per student and restaurants per seat.

Superficial Method – which is known as the floor area method. Similar to Unit method using a single rate ( usually cost per square meter) to calculate cost. E.g – 1000m2 office @ $10,000 per m2 = cost of 10 million 

Approximate Quantities Method – Regarded as the most reliable technique. Requires detailed design and SOQ which cost planners can use to apply rates gathered from historical data and publications.- Provides flexibility to adapt or change cost estimates in line with design.

2.03 Green Buildings Definition

Includes a GENERAL & BREIF overview of what “Green” building is all about.

Includes several key topics that will need addressing which will be discussed in more detail in other sections of the assignment e.g Explanation and theoretical definition of Green Building

Aims & Objectives of Green/Sustainable Building

Life Cycle Costing / Analysis

Environmentally Sustainable Design (ESD)

Embodied Energy

3.02 “Green” Impacts

Determine if Impact on cost modelling in general or specific cost models.

Direct and Indirect impacts both negative and positive. Social Costs Economical Costs Environmental Cost Ecological impact Energy conservation Pay back period can decrease Lower consuming of energy, water and maintenance Life cycle cost

Summary of Differential Assessment of Standard Cost Modeling vs Green Practice & Procedure

Standard Cost Modelling•Preliminary Estimate – Calculated on unit costing method (Kirkham, 2014).•Produce elemental & sub-elemental breakdown of the estimate (Smith & Jaggar, 2007).•Cost the elemental breakdown to align with the preliminary estimate (Towney, 2013).

Green Cost Modelling•Greater level of design required.•Apply net present value to costing.•Value engineer based on life cycle costing (RSMeans,2010).•Designed & costed to ensure project achieves the appropriate level of credits (NZGBC, 2014).

APA referencing as per 6th editionUse of reference managing software egUnitec library reference guide

4.01 APA Referencing

Use the marking guide to form headings and subheadings.

4.02 Format and Structure

2.01 Research &Evidence Research references – need more academia references

Cost Modelling Ferry And Brandon’s – Cost Planning of Buildings 9th Edition by Richard Krikham

Building Cost Planning for the Design Team by Jim Smith & David Jaggar

Cost Management of Construction Projects by Donald Towney

Cost Modelling Sitmore & Marston

Green Buildings http://www.greenbuildingsolutions.org/Main-Menu/Home/Modern-Materials-Archive/Sustainable-Design/GreenBuilding-Infor

mation-Modeling.html

http://www1.eere.energy.gov/femp/pdfs/buscase_section2.pdf

http://buildgreen.co.nz/definition.html

http://www.epa.gov/greenbuilding/pubs/about.htm

http://en.wikipedia.org/wiki/Green_building

http://www.nzgbc.org.nz/

http://www.sustain.canterbury.ac.nz/energy/buildings.shtml

http://www.academia.edu/1160074/SUSTAINABLE_CONSTRUCTION_AND_THE_IMPACT_ON_THE_QUANTITY_SURVEYOR

Whole life costing A new approach by Peter Caplehorn

Green Building Principles & Practices in residential construction by Kruger & Sevil

Collaborate within the team-Block course Collaborate with the class