The Ultimate BIM Knowledge Hub
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Revit Guides
Data Management
ELI5
Message Flow
A message flow depicts the exchange of messages between two participants who are ready to send and receive them. A message flow must connect two distinct pools. They are either
2022-07-04
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BS EN ISO 19650-3:2020
Organization and digitization of information about buildings and civil engineering works, including building information modelling (BIM) – Information management using building information modelling Part 3: Operational phase of the assets
2022-07-24
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asset management
coordinated activity of an organization to realize value from assets Note 1 to entry: Realization of value will normally involve a balancing of costs, risks, opportunities and performance benefits.Note 2
2022-07-24
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Virtual Design and Construction
Virtual Design and Construction (VDC) is the use of design models and project information to apply construction processes in a virtual environment to reduce time, cost, and ensure design intent.
2022-07-11
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How To
Please can you confirm if the life system system has to be lidded?
Please can you confirm if the life system system has to be lidded? There is no requirement for the life system to be lidded. A lid is effectively required
2025-09-23
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Equipment Clearance
Equipment Clearance shall be modelled for use in interference management and maintenance access requirements. It is the minimum space adjacent to the equipment required to allow access for maintenance, installation
2022-07-11
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Dictionary
Selectivity
Resolving Selectivity Issues in Electrical Design Free Trimble ProDesign Introduction Training Course Click the button below for more details: ProDesign Course Selectivity is achieved where,under overcurrent conditions, the protective device
2023-02-05
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Common Data Environment (CDE)
CDE state
ELI5-S1: BIM Basics E5: CDE areas and states This term replaces the ‘CDE area’ PAS 1192 term, the idea is the location of the information (container) is not important but
2022-07-27
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BS EN ISO 29481-1:2017
Building information models – Information delivery manual Part 1: Methodology and format
2022-07-24
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Last Planner System®
The collaborative, commitment-based planning system that integrates “should-canwill-did planning” (pull planning, make-ready look-ahead planning with constraint analysis, weekly work planning based upon reliable promises, and learning based upon analysis of
2022-07-11
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data dictionary
centralized repository of information about data such as meaning, relationships to other data, origin, usage and formatNote 1 to entry: The definition is from IBM Dictionary of Computing BS EN
2022-07-24
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Instructions
Project Template_RVT_2024
Revit Electrical Project Template 2024 v24.1.1 Template For: Electrical Engineers, Bim Managers, Electrical Designers Setup: Typically 2–4 hours — quicker for experienced users. View Details Technical Details Released: Jul 24,
2025-07-24
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How To
COBie data drop
COBie data drop Individual COBie data drops are the responsibility of Task Team BIM Managers, who must upload the required information containers in accordance with Exchange Information Requirements (EIR).The COBie
2022-10-15
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Current-carrying capacity
Themaximum current which can be carried by a conductor under specified conditions (Installation method, temperature,grouping,etc.)without its steady-state temperature exceeding a specified value (for example,90 ºCfor cables with thermosetting insulation).
2023-02-05
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Information Controller
Responsible for setup and management of the Common Data Environment (CDE), document submission, RFI and other project document transactions. [Appointment: Lead Appointed Party Information Controller, site-based/office based.] [source] PDE 4301
2022-07-11
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2022-06-29
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acceptance criteria
evidence required for considering that requirements have been fulfilled [cited from ISO 19650-2:2018(en), 3.1.1.1] Information issued via the Common Data Environment (CDE) must comply with Project Information Requirements (PIR) outlined
2022-09-03
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Organization of information
Exchange Information Requirements (EIR)
The Exchange Information Requirements (EIR) term introduced by BS EN 19650 replaces the PAS 1192 term Employer Information Requirements (EIR) on all projects where BS EN ISO 19650 compliance is
2023-08-11
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Blog
The Museum of the Future
Introduction The idea to connect 3D CAD models with construction programs (4th Dimension) was formulated in 1986-87 when Bechtel collaborated with Hitachi Ltd to develop the 4D visual model[1] The
2020-10-10
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Computer aided facility management (CAFM)
Originally coined in the 60s, The acronym has become a catch-all for a wide range of Facilities Management platforms and software. A CAFM system can be broadly defined as a collaborative,
2022-07-24
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macro diffusion dynamics
adoption model which identifies three diffusion dynamics top-down, bottom-up and middle-out Macro-Diffusion Dynamics model v1.1 (full size, current version). Macro-BIM adoption: Conceptual structures http://bit.ly/BIMPaperA8
2022-07-24
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NWC
NWC is a cache file. “When you open a CAD file in Navisworks, by default, a corresponding cache file (NWC) is created, which contains all of the conversion details required
2022-07-11
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Nominal line voltage to earth (Uo)
Uo Nominal line voltage to earth. Assumed to be 230 V for grid connected systems.
2023-02-05
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Cyber-Physical Systems
Systems that include integrations of computation, networking, and physical processes with feedback loops where physical processes affect computations and vice versa4. An example of a Cyber-Physical System is a Digital
2022-07-11
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built asset
individual or multiple buildings (e.g. a site or campus) or infrastructure (e.g. roads, railways, pipelines, dams, docks, etc.) built as part of a construction project or where the asset information
2022-07-15
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Information Protocol
The First Edition of the Building Information Model (BIM) Protocol published in 2013 identifies and puts into place specific obligations, liabilities and associated limitations on the use of the Building
2022-07-04
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Ze
That part of the earth fault loop impedance which is external to the circuit under consideration. For the supply cable it will be the impedance external to the installation. For
2023-02-05
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How To
Force Relinquish
Tip of the Day (TOD): How to Relinquish Locked Revit Models If you’ve ever been frustrated by locked Revit model elements when a team member is unavailable to relinquish them,
2024-07-14
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CDE gate
Transition [ISO19650] Transition is used to denote change (in the state of the information container)
2022-07-27
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Work stages
A division of standardised process and activities into named stages during the life of a system or facility. The process and activities extending from the definition of its requirements to
2022-07-11
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How To
CPR Cable Classification Guide
Since July 2017, all power, control and communication cables permanently installed in buildings must comply with the Construction Products Regulation (CPR).
This guide is your reference for navigating Euroclass ratings, selecting compliant products.
2025-06-04
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Blog
Insurance Backed Alliancing projects under the IPI model
Introduction Martin Davis member of the New Models of Construction Procurement (NMCP) Working Group and the Integrated Project Insurance (IPI) mentor describes the Integrated Project Insurance model (IPI) coupled up
2020-11-17
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Master Schedule
The purpose of a project schedule is to define how the project should be delivered and maintained based on the available resources. The development of a timetable is the first
2022-07-11
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Classification and Standardisation
Organisational maturity
a measure of an organisation’s readiness and capability expressed through its people, workflows, information, technologies and the reliable measurement procedures that are in place [source: Understanding Organizational Maturity
2022-07-15
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Design current (Ib)
Design current or ‘Ib’ in Amperes.The level of current to be carried by a circuit in normal service.
2023-02-05
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Power factor
Power factor is the ratio of the resistance (R) and impedance (Z) in a circuit, that is:Power factor = cos ∅ =R/Z
2023-02-05
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Workspace
A collection of content libraries and supporting files that define and embody a BIM standard. A workspace includes BIM libraries such as wall types, standard steel shapes, furniture, HVAC fittings,
2022-07-11
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Gateway (Inclusive)
[Or] When a branch splits, one or more branches are activated. Before merging, all active incoming branches must be completed.[1] Symbol 1] Silver, B. (2009). BPMN Method and Style: A
2022-07-04
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BS 11000‑2:2017
Collaborative business relationship management systemsPart 2: Guide to implementing BS ISO 44001
2022-07-15
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How To
Cable Ladder vs Perforated Cable Tray Selection Guide
Cable Ladder vs Perforated Cable Tray – Selection Guide (UK, 2025) Scope & references BS 7671:2018+A2:2022 and A3:2024 (selection & erection; installation reference methods; grouping). IET On‑Site Guide to BS
2025-08-24
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Conformity Assessment Committee (CASCO)
Committee whose secretariat is provided by ISO/CS that deals with conformity assessment and is responsible for the development of conformity assessment standards. https://www.iso.org/glossary.html
2022-07-24
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Spacial Asset
A spacial asset can be defined as a specific location such as a zone, boundary, area, floor or room with a known location and extents.For most businesses, spacial assets usually
2022-07-11
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energy let-through of a device (I2t)
I2t The energy let-through of a device in A2s. The total amount of energy let through by a protective device for a given level of fault current at a stated
2023-02-05
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major change
change that affects the meaning, function or intended useNOTE Definition applies to properties and groups of properties.PAS 14191:2020
2022-07-24
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UML diagram
provides the data structure for data templates using objects, collections and relationships between them. The multiplicities in the UML diagram specify the range of allowablecardinality values, giving a specification of
2022-07-24
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AD Hoc Group (AHG)
AD HOC GROUP (AHG) Group set up within a committee to look into a particular problem and report back to the parent committee at a meeting. The group is disbanded after
2022-07-24
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Dictionary
coordination
Coordination goes beyond orderly task execution, it transforms individual perspectives into shared, community-wide actions. It’s not just a subset of collaboration; it’s the engine that makes collaboration more than a patchwork of solo efforts.
2023-02-25
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rationalise
In construction, to rationalise is to attempt to remove, explain or justify irrational quantities, processes or systems or else adjust unreasonable design decisions by employing logic or reason, (behaviour, attitude),
2022-07-11
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BS EN ISO 19650-2:2018
Organization and digitization of information about buildings and civil engineering works, including building information modelling (BIM) — Information management using building information modelling Part 2: Delivery phase of the assets
2022-07-24
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Plain Language Questions (PLQ)
The publication of ISO 19650 set of standards replaces use of PLQ and instead introduce the term with exchange information requirements (EIR) and project information requirements (PIR). Project information requirements
2022-07-27
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