Glossary: Key AEC Terms & Terminology
Clear communication is half the battle on any project. Below is an at‑a‑glance glossary of the core terms used in construction.
AHJ (Authority Having Jurisdiction) – The code‑enforcing body—often a city or county building department—that must approve permit submissions.
Archive – The long‑term storage state for project information after the as‑built record is accepted.
As‑Built – The reconciled set of drawings reflecting all field changes and forming the final record documents.
Bid Set – Drawing package issued for contractor pricing during procurement.
BIM (Building Information Modeling) – A digital model and data methodology capturing geometry and attributes for the entire asset life cycle.
Big Room / War Room – A co‑located space (physical or virtual) where multidisciplinary teams conduct intense coordination sessions, often during design sprints or pull‑planning workshops.
Change Log – A running register that lists each document revision, who issued it, and why.
Change Order (CO) – A formal modification to the construction contract that alters scope, cost, or schedule.
Clash Detection – The process of identifying spatial conflicts between building elements before construction begins.
Common Data Environment (CDE) – A single cloud location where the most current project information is stored, versioned, and retrieved.
Commissioning – Verification process confirming that building systems perform as intended before handover.
Digital Twin – A live, data‑fed digital replica of the built asset maintained throughout its operational life.
Discipline – A design specialty such as architectural, structural, or mechanical; also used as a revision code on title blocks.
Field Revision – A drawing update that originates from site conditions or change orders during construction.
Inspection – An official review by authorities to confirm work complies with codes and approved plans.
ISO 19650 – International standard for managing information over the whole life cycle of a built asset using BIM.
Look‑Ahead Schedule – A short‑range construction timeline (typically three to six weeks) aligning trades on near‑term tasks.
NBIMS‑US v4 – National BIM Standard, United States version 4; harmonizes with ISO 19650 and defines U.S. best practices.
Parametric
- Parametric Design: A design approach where elements are defined by parameters and rules, allowing the model to automatically adapt when inputs or constraints change.
- Parametric Workflow: A process framework driven by adjustable parameters, enabling tasks, outputs, or dependencies to update dynamically as project variables evolve.
- Parametric Writing: The application of rule-based, parameter-driven methods to text, producing adaptive documents (e.g., reports or specifications) that update automatically when inputs or conditions change. This currently exists as dynamic reporting, data-driven text, or template based specifications.
Permit Set – Drawings submitted to the AHJ to obtain building permits.
Plan Table – A large‑format interactive display, such as Volanti’s, used for reviewing digital plans on site or in the office.
Plan Viewer – Software or hardware interface that displays multi‑page drawing sets in an easy‑navigation format.
Plan Workflow – The agreed path that drawings, models, and related documents follow from initial concept to archive.
Published – The controlled state for information that is locked for downstream use; edits require a new revision.
Pull Planning – A lean method where trade partners collaboratively work backward from a milestone to identify task sequences and commitments.
Punch List – The list of outstanding items to be completed or corrected before project handover.
QR‑Ready Title Block – A drawing title block that reserves space for a machine‑readable code linking to the live digital file.
RFI (Request for Information) – A formal query issued when clarification is needed on contract documents.
Revision Cloud – A cloud‑shaped annotation that highlights areas changed since the previous revision.
Shared – The semi‑controlled state where information is available for coordination but may still change.
Submittal – Items such as shop drawings or samples submitted by the contractor for design‑team approval.
Substantial Completion – The milestone when the project is safe to occupy and only minor punch items remain.
Title Block – The standardized panel on a drawing sheet containing project, sheet, revision, and approval data.
WIP (Work in Progress) – The private state where a discipline develops content before sharing for coordination.
Have suggestions for additional terms? Let us know in the comments below and we’ll keep the glossary growing.
References
Primary authoritative references for plan workflow terminology
- ISO 19650 series (Parts 1–6) – international standard for information management using BIM
- NBIMS-US v4 – National BIM Standard-United States (National Institute of Building Sciences)
- AIA E203-2013 & G202-2013 – BIM and digital-data protocols (American Institute of Architects)
- AIA A201-2017 – General Conditions of the Contract for Construction (key for RFIs, COs, Submittals)
- National CAD Standard (NCS v6) – U.S. layering, sheet numbering, and drawing conventions
- CSI MasterFormat 2024 & UniFormat – Construction Specifications Institute classification systems
- Lean Construction Institute – Last Planner® System terminology and pull-planning guidance
- Construction Progress Coalition – CDX (Common Data Exchange) Glossary & Maturity Matrix
- buildingSMART International – IFC schema & Data Dictionary (openBIM definitions)
- USACE BIM/CAD Standards – U.S. Army Corps of Engineers criteria for digital deliverables
- ISO 12006-2 – Framework for classification of construction information
- PAS 1192 legacy suite (UK) – Precursor to ISO 19650, still cited for CDE and revision states