Architectural and interior design services
Being on budget
There are various aspects that can be used to evaluate the success of an architectural and/or interior design project. First, there is its functional aspect, which relates to how the planning of the space and the designing of the systems of a building achieve the level of comfort and the ease of performance expected by future users. Secondly, there is its aesthetic aspect, which refers to the visual and general sensual appreciation of how forms, scale, proportions, colours, etc. meet one's innate criterion of sensuous pleasure provided by our appreciation of the beautiful and the exceptional. Lastly, but not the least, there is its financial aspect, which refers to the cost of achieving the previous two within the constraints given by the financial limitation available to a project.
In this brief article, we will review how a project cost is managed throughout its multiple phases from pre-design to construction completion.
1. Cost Targeting
For an architectural and/or an interior design project to be on budget, two actions shall be taken. First, we have what can be called Cost Targeting, which is also called Cost Planning.
Cost Targeting is carried through at the earliest phase of discussion between client and design professional. At that stage, the client in addition to be providing the architect or lead interior designer with a complete list of spatial and functional needs, the client shall also disclose the project's cost expectation. From this initial collection of information, in conjunction with previous experience and historic data, the design professional should be able to fit size, scale, form and function to the available budget. As the target is laid down, the design process can then moves from conceptual to design development stage. From that point on, the target budget has to remain clearly in view to avoid undesirable outcomes. For that reason, that second sequence of activities is called Cost Control, also called Monitoring of Construction Cost.
2. Cost Controlling
Design development is this process where creative licence would play an important role in defining the unique physical characteristics that distinguish one project from another. This comes with a risk. Detailing can rapidly add cost to a simple concept, that was initially simply sketched with few broad lines only. It is therefore the responsibility of the project architect or the lead interior designer to constantly review the work in progress. Therefore, careful reviews of the work in progress shall be performed regularly and shall be performed with great objectivity to prevent excess or unnecessary high standards of quality and form. Controlling cost shall prevail mostly at that stage.
As the design becomes sufficiently developed, the work advances into the production of the building permit and construction drawings phase, at which time construction details are refined and the various material selected. The project manager shall then prepare cost information on individual components of the project and make this available to the client. All along during the design process, the project manager shall oversee the work of the production team members to ensure that the project remains within the initially defined budget and if an important deviation from the target is found, appropriate measures and decisions to adjust the design shall be taken by both the project manager and the client.
In order to achieve a better control of the cost in especially complex projects, the project manager have the option of getting assistance using the services of cost consultants, quantity surveyors or to simply have few discussions with reputable construction contractors, whom should be able to provide reliable information on current and local cost of labour and material.
List of factors effecting a bottom line
To illustrate the complexity involved in controlling the cost of a project, we are providing the following list of factors that can affect a bottom line.1. Economic and Political
Inflation
Market Conditions
The use or not of union labour
Interest rates and financing costs
Exchange rates between nations
Political and Social Climates
Changing legislation
Municipal regulations
2. Environmental
Site characteristics
Weather conditions
Project Location
Prevailing Hazardous conditions
Demolition and the required shoring technique
3. Building Type
Method of construction
Building height and number of storeys
Building mass
Choice of finishes
Choices of systems
Planned life of the Structure
4. Methods of Project Delivery
Complexity of bidding procedures
Insurance requirements
Bonding requirements
Regulations
Recycling
Safety and clean-up
Scheduling construction to not disturb neighbouring areas and functions
5. Clarity or lack of the scope of work
Lack of technical data
Lack of a defined program
Timing and deadline for scheduled opening
Levels of estimate
The following list of terms used in the design and construction industry to describe the various levels of estimate.• Class “D” Estimate
This estimate is characterized by a level of accuracy of approximately 20%. It constitutes a rough evaluation of a project cost based on initial information of its functional requirements. At that early stage, the assessed cost would be based on precedent projects of similar size and scope.
• Class “C” Estimate
This estimate is characterized by a level of accuracy of approximately 15%. Still a rough evaluation of a project cost, this estimate can be provided prior to the design development stage, when the design concept is know and after a preliminary review of the site conditions.
• Class “B” Estimate
This estimate is characterized by a level of accuracy of approximately 10%. As the design of a project is developed and as the various consultants are hired and are providing accounts of cost of the systems they are designing, the overall final cost figure of the project can then be refined with increased accuracy.
• Class “A” Estimate
This estimate is characterized by a level of accuracy of approximately 5%. It is the most accurate assessment of a project cost prior to commencing construction. The continued accumulation of all pertinent information, complete with the exercising of design control during the production of construction drawings allow this level of accuracy, which is only available at pre-tender stage.