SLIA Part III key terms

A formal written statement by the architect confirming that works have reached the stage where the building can be used for its intended purpose, with only minor outstanding items. It triggers the defects liability period and release of retention money.

A percentage of each payment withheld by the client as security against defects or non-completion, released in stages after practical completion and at the end of the defects liability period.

A defined period after practical completion during which the contractor must rectify defects notified by the architect at no extra cost to the client. Its length is stated in the contract conditions.

A periodic valuation issued by the architect certifying the amount due to the contractor for work done to date, less retention and previous payments. It is the basis for progress payments during construction.

A written instruction by the architect authorising a change to the scope, quality, quantity, or timing of the works. It must be issued within contractual authority and is valued for payment.

The concluding financial statement of a project that reconciles all measured works, variations, adjustments, and deductions to establish the total contract sum payable.

A financial guarantee, usually issued by a bank or insurer, that secures the contractor's obligations under the contract and compensates the client if the contractor fails to perform.

A pre-agreed sum payable by the contractor for each day of delay beyond the contractual completion date. It must be a genuine estimate of loss, not a penalty.

An adjustment to the contractual completion date granted by the architect for delays caused by events outside the contractor's control, such as weather, variations, or client default.

A scheduling technique that identifies the longest sequence of dependent activities determining the shortest possible project duration, so resources can be focused on activities that cannot slip.

A bar chart showing planned and actual activity durations against a calendar timeline. It communicates progress and sequencing but does not by itself reveal the critical path.

A document listing measured quantities of work items with descriptions, used for tendering and valuation. It provides a common basis for comparing contractor prices.

A written direction from the architect to the contractor on a site matter, such as clarifying workmanship or sequencing. It differs from a variation because it does not change scope or price.

Insurance covering an architect against claims of negligence, error, or omission in professional services. It protects both the practice and the client who relies on the architect's work.

The legal and ethical obligation of an architect to exercise reasonable skill, care, and diligence toward clients and others who foreseeably rely on the professional service.

A failure to meet the standard of care expected of a reasonably competent professional in similar circumstances, resulting in loss or damage to another party.

A situation where an architect's personal, financial, or other interest could improperly influence professional judgment. It must be disclosed promptly and managed or avoided.

The set of ethical and professional standards governing an architect's behaviour, including competence, integrity, confidentiality, and fair dealing with clients and the public.

Structured learning and activities that architects undertake throughout their careers to maintain and enhance competence, often required annually for registration renewal.

The formal listing of an individual as a licensed architect with the statutory or professional body, conferring the legal right to practise and use the protected title.

A professional designation, such as 'architect', that may be used only by persons holding the required registration or licence. Unauthorised use is an offence.

Statutory consent required before development begins, assessing land use, density, height, and impact on surroundings. It is separate from building regulation approval.

Statutory approval confirming that proposed construction complies with building codes and technical standards for safety, health, and accessibility. Work may not lawfully start without it.

An official document issued after inspection confirming that a completed building complies with approved plans and regulations and is fit for occupation and use.

The body of regulations setting minimum requirements for structural safety, fire protection, sanitation, accessibility, and energy performance in the design and construction of buildings.

Local land-use regulation that divides an area into zones and controls permitted uses, building height, plot ratio, and setbacks. It shapes what can be built on a site.

The ratio of total gross floor area of a building to the area of its site. It is a key planning control limiting development intensity.

The minimum distance a building must be set back from site boundaries, streets, or other features, imposed by planning rules to protect light, air, and privacy.

The continuous routes, including doors, corridors, stairs, and exits, provided so occupants can travel safely from any point in a building to a place of safety in a fire.

A measure of how long a building element resists fire, expressed in minutes for stability, integrity, and insulation. Ratings are assigned to walls, floors, and doors.

The subdivision of a building into fire-resistant compartments by rated walls and floors to limit the spread of fire and smoke and to provide protected escape routes.

The extent to which a design can be constructed efficiently and safely with available methods, materials, and site conditions. It influences cost, programme, and quality.

A structured assessment of drawings and specifications during design to identify construction difficulties, sequencing conflicts, and safety issues before work begins on site.

A systematic process of reviewing design and construction choices to achieve required function at the lowest whole-life cost, without reducing quality or performance.

Designing buildings and environments so they can be used by everyone, regardless of age, ability, or circumstance, without adaptation or specialised features.

A digital process for creating and managing coordinated three-dimensional information about a building throughout its life cycle, supporting design, clash detection, and facility management.

The automated checking of a building information model to find physical conflicts between building elements, such as ducts intersecting structural beams, before construction.

The transfer of a party's rights and obligations under a contract to a third party, commonly used when a client novates the design team to the contractor under design-and-build procurement.

A procurement route in which a single contractor is responsible for both design and construction, giving the client a single point of accountability for cost and completion.