Design Economics and Cost Planning Flashcards
What are the factors affecting life cycle of a building?
Capital costs, renewal costs, operation costs, maintanance costs, end of life value
What is life cycle costing?
It is a methodology to asses the total cost of ownership of a built asset over its entire life
What are the design parameters commonly used?
-Wall/floor ratio
-GEA/Site Area
-GIA/GEA
What is cost planning and when does it commence?
It is a budget distribution technique during design development of building. Typically starts from RIBA 2-4
What is the difference between cost estimate and cost planning?
Cost estimate is determination of possible outturn of cost of a building at an early stage typically RIBA 0-1. Cost plan takes places during design development phase.
What are information to carry out cost plan/cost estimate?
- Building location and type
- floor Area/functional units
- Storey height
- Envisaged finishes
- Initial floor plans, elevations, sections
- Requirements for refurbishment
- Indication of specs and quality
- Indicative prgoramme, procurement, contract strategy
- Budget and cashflow
-Site condition - Details of professional fees, development costs, VAT and inflation
What is the difference between cost and price?
Cost is composed of material, labour and plant costs. Price includes material, labour and plant costs plus overhead and profit.
What are the typical components of a cost plan?
According to NRM, cost plan includes
- Facilitating works, substructure, superstructure, finishes, services, FFE, external works, works to existing buildings, prefabricated works, external works, MC Preliminaries and OH&P, consultant fees, risk allowances, contingency, tender and construction inflation
How would you prepare a cost plan on CD, SD or DD stage?
- Gather information available such as design, programme
- Prepare the cost plan based on NRM1 guidance.
- Ensure all price are up to date to the current market/base date.
- Allow for appropriate contingency whenever required.
- Reconcile cost movements from design development stages
What is pre-tender estimate?
It is an estimate to forecast the expected outturns of tender returns.
What are the common sources of cost data?
Previous tender submission and contract sum analysis, benchmarks, BCIS, building cost models, published price books, specialist subcontractors and suppliers.
What are the published cost data available?
BCIS, SPONS, BKI
What are price indices? How does it affect your estimate?
These are factors considering the varying prices per different locations, as resource and supply chain might differ from one to the other.
What is base date? Why is it important?
Refers to the date on which the rates and prices are based on. This the starting point for considering inflation.
What are the development costs aside from construction costs?
Professional fees, client decant costs, financing, site acquisition/lease.
How would you determine risk or site allowances?
- Coordination and allocation of risk responsbilities to stakeholders
- Identify risks, assess, respond and monitor risk
What are the types of risk exposure?
Risk avoidance, risk transfer, risk reduction, risk retention
What are the risk allowances allowed in an cost plan?
According to NRM, construction risk, design risks, employer change risks, other employer risks.
How would you value risk allowances?
-If not yet established, I will put up a risk register to Identify and assess risk exposure.
- I will provide cost against each risk and include them in the cost plan.
- the risk allowance should be updated over the course of cost plan development.