Estimating+Design+and+Construction+Costs+090511

Estimating+Design+and+Construction+Costs+090511 - Cost...

Info iconThis preview shows pages 1–12. Sign up to view the full content.

View Full Document Right Arrow Icon
$ $ $ Cost Estimating: Introduction and Overview CEE100 May 9, 2011
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Life Cycle Building process Design Construction Sustainable Building Research And Sustainable Living Practice Tech development/ adaptation/ flexibility Systems Function and Data Collection Adapted from Arto Kiviniemi, VTT, Finland
Background image of page 2
What types of cost to consider for what time frame? t $, t, energy, CO 2 , human costs, etc. Facility Maintenance Cost Business Operations Cost Design- Construction Costs Value from Facility Building Operations Cost
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Space as a Business Resource • In commercial office buildings investments are just a small part of the total costs: Relative values in 25 year period: Investment Use and Business costs maintenance costs 100 380 4,260 (Source: Davis Langdon Consultancy, UK, using capital interest 6%) 100 500 20,000 (Source: The Long Term Costs of Owning and Using Buildings, Royal Academy of Engineering, UK)
Background image of page 4
Rincon Center Estimate by Tutor Saliba What can you do/decide with this estimate? How could it be improved?
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Purpose of Cost Estimating • Go/no go decision to build project • Basis for evaluation of alternatives • Establish bid price • Establish life cycle and construction budget • Forecast probable actual cost • Tool for planning project • Establish cost impact of design changes • …
Background image of page 6
Purpose of Cost Estimating • Estimates are created by different project participants for different reasons at different times with different levels of detail – Architect / Consultant to guide the design – GC to get project, control project – Owner / CM / Architect to monitor project – Subcontractor to get project, control project, price change orders • On average, each building component is estimated seven times during a project (Laitinen 1998)
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Essential Characteristics of a Good Cost Estimate • Of course: – Complete, accurate • But these are difficult to check, so good cost estimates are also – Well structured and organized, including a coding scheme that allows use of data beyond the estimate – Have the appropriate level of detail – Focus on and indicate risk (ranges of costs)
Background image of page 8
CONSTRUCTION Labor Materials Equipment Overhead Profit Subcontracts DESIGN OWNER COSTS Property Acquisition: 5% Preliminary Planning : 3% Design: 7% Construction: 54% Construction Administration: 6% Financing: 20% Owners Internal Cost: 5% Major elements of cost estimates Main methods for estimating of design and management work: • Resource, based on schedule or production • Output based (# of drawings, # of submittals, …) • % of construction costs
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Estimate Class Accuracy (%) Description Order of Magnitude ± 30 to 50 Feasibility study - cost curves Parameter ± 25 to 30 Major equipment - factored Detailed ± 10 to 15 Based on component-level quantities Definitive < 10 Based on detailed drawings Level of Influence time +$ -$ Accuracy of Estimates time +$ -$ Types of Estimates
Background image of page 10
Estimating Approaches for Design Services • % of construction (life cycle?) cost
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 12
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 36

Estimating+Design+and+Construction+Costs+090511 - Cost...

This preview shows document pages 1 - 12. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online