ARC PPE key terms

The degree of skill and diligence ordinarily exercised by reputable architects performing similar services in the same locality and under similar conditions. It defines the legal benchmark for negligence claims against a design professional.

A fiduciary relationship in which the architect acts on the owner's behalf with authority to bind the owner in defined matters. It imposes duties of loyalty, obedience, disclosure, and reasonable care on the agent.

The contract establishing scope, schedule, compensation, and risk allocation between client and architect. Its terms define duties, standard of care language, termination rights, and dispute resolution, and control most professional liability exposure.

Failure to exercise the standard of care owed to another, causing damage. In design practice it usually means a foreseeable error or omission in services, not merely an imperfect result or a client's disappointment.

Coverage protecting design professionals against claims of negligent acts, errors, or omissions in performing professional services. Policies are typically claims-made, so coverage depends on when the claim is reported, not when the error occurred.

Tasks outside the basic scope defined in the owner-architect agreement, such as extensive redesign, multiple bid packages, or post-occupancy evaluation. They require separate authorization and compensation, usually documented by written amendment.

The standard phases of architectural service described in the owner-architect agreement, from schematic design through construction contract administration. Defining them precisely prevents disputes about what work is included in the base fee.

A factor applied to direct salary cost to derive a billing rate, covering overhead, fringe benefits, and profit. Firms use it to price hourly work consistently and to test whether negotiated fees recover true costs.

The percentage of paid staff time charged to billable projects rather than internal, marketing, or administrative activities. It is a core indicator of firm profitability and staffing efficiency.

Salaries and wages paid to staff working directly on projects, before overhead and profit are added. It is the base figure used in cost-plus and multiplier-based fee calculations.

A hierarchical decomposition of project scope into manageable, deliverable-oriented components. It supports scheduling, cost estimating, and assignment of responsibility so that no scope is unplanned or unbilled.

A scheduling technique that identifies the longest sequence of dependent activities determining the earliest project completion. Delays on critical-path activities directly delay the project, unlike float-bearing activities.

The amount of time an activity can be delayed without delaying project completion. Total float belongs to the path; its ownership and use are often negotiated in construction contracts.

A time-based plan sequencing design or construction activities with durations, dependencies, and milestones. It is the baseline against which progress is measured and delay claims are evaluated.

The systematic process of researching and documenting an owner's needs, goals, and constraints as quantified requirements. It produces a written program that guides design decisions and later verifies whether the design meets stated needs.

A grid pairing all spaces in a project and rating how closely each should be located to the others. It converts qualitative relationships into a diagrammatic basis for blocking and stacking.

A loose graphic showing spaces as shapes linked by lines representing desired proximity or circulation. It tests relationships before dimensions, walls, or structure constrain the plan.

The quantified list of required rooms or areas with sizes, counts, and performance criteria. It becomes the benchmark for schematic design and for post-occupancy evaluation of whether needs were met.

An intensive collaborative workshop bringing stakeholders together to generate and test design options within a compressed timeframe. It builds consensus early and surfaces conflicts before documentation hardens.

The first design phase, establishing concept, scale, and general configuration through diagrams, sketches, and preliminary plans. It ends with owner review and approval before design development begins.

The phase refining the approved schematic concept into defined building systems, materials, and dimensions. It fixes enough detail to support preliminary cost checks and begins coordination among disciplines.

Local law regulating land use, density, height, setbacks, and bulk within designated districts. Architects must verify zoning compliance early because variances are slow and uncertain.

The ratio of total building floor area to the area of its lot. It caps development intensity and is calculated differently by jurisdictions, so local definitions must be checked.

The minimum required distance between a building or structure and a property line, street, or other reference line. Setbacks control light, air, privacy, and fire separation between buildings.

Administrative relief from a specific zoning requirement granted when strict application causes undue hardship and the request will not harm neighboring property. It is narrower than a rezoning.

A legally established use or structure that no longer complies with current zoning because regulations changed after it began. Rules typically limit expansion, reconstruction after damage, and discontinuance.

The drawings, specifications, and contract documents that legally describe the work for bidding and construction. Their quality and coordination directly drive change orders, claims, and liability exposure.

Written requirements describing materials, workmanship, and performance standards that accompany drawings. Under standard contract forms, specifications and drawings are complementary and together define the work.

A contractor-prepared drawing detailing fabrication, installation, or assembly of a component for the architect's review. Review confirms conformance with design intent and does not relieve the contractor of responsibility.

A formal written query from the contractor asking the design team to clarify or interpret contract documents. Timely, written responses preserve the record and reduce disputes over intent.

A written modification to the construction contract, signed by the owner, adjusting scope, price, or time. Architects typically prepare and evaluate it but lack authority to bind the owner without consent.

The stage when the work is sufficiently complete for the owner's intended use, triggering warranty start, retainage release, and the punch list process. It is certified in writing by the architect.

A documented list of incomplete or defective items identified near substantial completion that the contractor must correct. It distinguishes minor finish work from work preventing occupancy.

Model regulations governing egress, fire protection, and occupant safety in buildings. They set requirements for exits, travel distance, and occupant load that shape planning decisions.

The calculated number of people a space is designed to hold, derived from area and use factors. It determines required egress capacity, plumbing fixture counts, and exit requirements.

The minimum clear width of exits, corridors, and stairs needed to serve the calculated occupant load. Width requirements vary by occupancy and whether sprinklers are present.

The exterior enclosure separating conditioned interior space from the outdoors, including walls, roofs, windows, and foundations. Its performance governs energy use, moisture control, and occupant comfort.

A path of high-conductivity material through insulation that bypasses the intended thermal resistance. Uncontrolled bridging causes condensation risk and increased heating and cooling loads.

Design that reduces resource consumption, environmental impact, and lifecycle cost while supporting occupant health. It integrates site, water, energy, materials, and indoor environmental quality decisions from the earliest phases.

Study of a parcel's topography, soils, drainage, climate, solar exposure, views, access, and context to inform siting and design. Findings typically drive building orientation and grading strategy.