Design Economics and Cost Planning Flashcards
What is an order of cost estimate?
The purpose of an order of cost estimate is to establish affordability of a proposed development for a client.
What method of measurement would you use to prepare one?
In accordance with NRM1: Order of cost estimating and cost planning for capital building works
Name the three NRM documents?
- NRM1 – Order of cost estimating and cost planning for capital building works
- NRM2 – Detailed measurement for building works
- NRM3 - Order of cost estimating and cost planning for building maintenance works
What are the New Rules of Measurement?
Published by the RICS, to provide a standard set of measurement rules for estimating, cost planning, procurement, and whole-life costing for construction projects - Helps avoid disputes
What does NRM2 do?
Establishes detailed measurement rules allowing the preparation of bills of quantities, quantified schedules of works and schedules of rates in order to obtain tender prices. Guidance is also provided on the content, structure, and format of bills of quantities.
How is risk dealt with under NRM?
It is recommended that risk allowances are not a standard percentage, but a properly considered assessment of the risk, considering the completeness of the design and other uncertainties such as the amount of site investigation done
Make allowances for the following risks;
1. Design development risks
2. Construction risks
3. Employer changes risks
4. Employer other risks
What are the four primary levels of standard elements in NRM?
- Group Element
- Element
- Sub Element
- Component
What is included within preliminaries list in NRM2?
1 PRELIMINARIES
1.1 EMPLOYER’S REQUIREMENTS
1.1.1 Site accommodation
1.1.2 Site records
1.1.3 Completion and post-completion requirements
1.2 MAIN CONTRACTOR’S COST ITEMS
1.2.1 Management and staff
1.2.2 Site establishment
1.2.3 Temporary services
1.2.5 Safety and environmental protection
1.2.6 Control and protection
1.2.7 Mechanical plant
1.2.8 Temporary works
1.2.9 Site records
1.2.10 Completion and post-completion requirements
1.2.11 Cleaning
1.2.12 Fees and charges
1.2.13 Site services
1.2.14 Insurance, bonds, guarantees and warranties
What is an order of cost estimate?
The purpose of an order of cost estimate is to establish affordability of a proposed development for a client.
What stage does an Order of Cost Estimate get carried out?
Stage 0 - Strategic Definition
Stage 1 - Preparation and Brief
How would you price professional fees in an order of cost estimate?
as a percentage
What’s the difference between a cost estimate and a cost plan?
Cost plan is an iterative process, updated and tracked as design progresses, to control the development of the design and ensure client achieves value
How would you prepare an estimate for M&E works?
Generally consult and MEP expert, otherwise I would use historic data and apply this to general items. For specialist works, I would seek advice
What is a provisional sum?
A provisional sum is an allowance (or best guess), usually estimated by a cost consultant, that is inserted into tender documents for a specific element of the works that is not yet defined in enough detail for tenderers to accurately price.
What is the difference between defined or undefined?
Defined provisional sums are those which have been described in sufficient detail that the contractor is expected to have made allowance for them in their programming, planning and pricing preliminaries.
Undefined provisional sums are less well described and so the contractor cannot be expected to make allowance for them in their programming, planning and pricing preliminaries.
How are they expended?
Instructed by CA - As provisional sums are replaced by valuations of the work actually done as the project progresses, the contract sum may increase or decrease. In addition, depending on the degree to which the works that the provisional sum relates to can be defined at the tender stage, the actual works that are undertaken may affect the contractor’s programming, planning and pricing preliminaries
What are the main tasks of the cost manager?
- preparing cost budgets
- managing tender processes
- compiling contract documents
- carrying out on site valuations
- cost reporting
- reviewing contractor variation claims
- negotiating final accounts
What is the purpose of cost planning?
- To ensure that employers are provided with value for money on their building projects
- Employers and designers are aware of cost implications of their proposals
- Provide robust cost information upon the employer can make informed decisions
Define base cost estimate?
An estimate of all those items which are known, or a degree of certainty exists
What information is required to produce an order of cost estimate?
From the employer:
* Location and availability of site.
* Statement of building use and size.
* Any refurbishment requirements.
* Initial project/design brief.
* Enabling works details.
* Draft programme.
* Site conditions.
* Budget/cash flow constraints.
* Construction procurement options
From the architect:
* Design study sketches or drawings.
* Schedules of areas.
* Legislative constraints.
* Initial risk register.
What is an elemental cost plan?
They evolve through the life of the project, developing in detail and accuracy as more information becomes available about the nature of the design, and then actual prices are provided by specialist contractors, contractors, and suppliers.
The elemental method is an alternative approach for calculating the building works estimate. The elemental method considers the major elements of a building and provides an order of cost estimate based on an elemental breakdown of the building project. Ordinarily, the group elements and elements used in the elemental method are the same as those used in the elemental cost planning process
What methods can be used for cost planning?
Floor area method - The total GIFA of the building or buildings is measured and multiplied by an appropriate cost/m2 of GIFA.
Functional unit method - Functional units are a unit of measurement used to represent the prime use of a building or part of a building. It is essential that the functional unit is clearly identified when measurements are expressed in this way.
Elemental method - The elemental method is an alternative approach for calculating the building works estimate.
The elemental method considers the major elements of a building and provides an order of
cost estimate based on an elemental breakdown of the building project