The Ultimate BIM Knowledge Hub
Your one-stop resource for BIM electrical.
Revit Guides
Data Management
ELI5
Product Data Definition
A Product Data Definition (PDD) document intended to provide a consistent methodology for the definition, creation, management and sharing of product information throughout the life cycle of an asset, based
Tier 1
In the construction industry, Tier 1 is a Contractor referred in ISO 19650 as the Lead appointed party, who provide goods or services directly to the ultimate client. The Tier
validation
confirmation, through the provision of objective evidence, that the requirements for a specific intendeduse or application have been fulfilled [SOURCE: BS EN 17412‑1:2020] For example, it is the process of
BS EN ISO 31000:2018
Risk management guidelines ISO 31000 is an international standard first published in 2009, the current version published in 2018. The standard contains principles and guidelines for effective risk management. It
Quantity Surveyor (QS)
person who provides financial and contractual advice and services for planning, carrying out and completion (3.5.23) of construction works https://www.iso.org/obp/ui#iso:std:iso:6707:-2:ed-3:v1:en:term:3.8.25
BS 8541-5:2015
Library objects for architecture, engineering and construction Part 5: Assemblies – Code of practice Note: ISO 22014 and ISO 22057 are under development tosupersede BS 8541, parts 1-6.
Organizational Information Requirements (OIR)
ELI5-S1: BIM Basics E7: OIR explained information requirements in relation to organizational objectives BS EN ISO 19650‑1:2018 (3.3.3)
jet
extinguishing medium, usually water, leaving a nozzle as a continuous stream, water spray, or waterfog (mist) BS 4422 2005 Each of these methods has its own advantages and is chosen
Navisworks file format (NWF)
When saving to a “Navisworks file format (NWF), only a list with pointers to the files currently loaded is saved, along with the scene’s environment, the current view, clash results,
Cost Led Procurement
A procurement method introduced by Constructing Excellence and the Cabinet Office intended to allow industry to use its experience and knowledge to develop innovative solutions through leveraging design, materials, subcontracting, direct labour
Depth of lay rating Factor (Cd)
The rating factor Cd is applied to cable sizing calculations for cable installed in the ground. Its value varies according to the depth of lay installed. See BS7671:2018,Table4B4. Indicates the
Start Event
A start event specifies where a process will begin. Start events can only react when a trigger is “caught.” Symbol 9). BPMN Method and Style: A levels-based methodology for BPM
Semi-enclosed fuse rating factor (Cf)
The rating factor Cf = 0.725 is applied to cable sizing calculations for any circuit protected by a semi-enclosed fuse to BS3036.
Dimensionality
A dimension of space, such as width, height, or length. can be zero-dimensional (location point), one-dimensional (e.g. line, curve, path), two-dimensional (e.g. surface, face), or three-dimensional (e.g. surface, face) (e.g.
Domestic PV sizing rule-of-thumb (RoT)
Domestic PV sizing rule-of-thumb (RoT) Grid-tied, focused on self-consumption UK rule-of-thumb (RoT) Peak Sun Hours (PSH): 3.5 summer, 2.0 spring/autumn, 1.0 winter For calc use Peak Sun Hours (PSH) =
People
An element of a BIM strategy which is often overlooked. Clear communication is required as to why and how you intend to implement BIM and gain support by engaging BIM
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
blockchain
The blockchain is a transaction database shared by all nodes involved in the system based on the Bitcoin protocol. It is a data structure consisting of linked blocks (e.g. confirmed
Arc Fault Detection Devices (AFDDs)
Arc Fault Detection Devices (AFDDs) in the UK: Technical Requirements and Implementation Executive Summary Arc Fault Detection Devices (AFDDs) represent a significant advancement in electrical fire safety. This whitepaper provides
tension between hope and ambiguity
term coined by Deloitte[1], it is a current situation where whilst businesses conceptually understand the significant changes that information Management (IM) and technology may bring, they have divergent agendas and
plan of work
It is a project-specific “digitally checkable” framework set-up to ensure that the deliverables of all contributors are identified and appropriate to the decisions required at each work stage. The plan
expert
person who, through knowledge or experience, has competence to give an opinion in the fields about which he/she is consulted[SOURCE: ISO 13302:2003, 3.10, modified — The domain “” has been
promotor
algorithm that generates an interaction schema from an interaction framework, interaction framework schema, and templates file as input [1] 1 Online Browsing Platform (OBP) [WWW Document], n.d. URL https://www.iso.org/obp/ui#search (accessed
Grouping rating factor (Cg)
Grouping rating factor used for calculatingminimum required cable size. For cables installed in air, values for this factor are given BS7671:2018,Tables4C1,4C4,4C6.For ground installations, values are given in Table4C2. Grouping a
BS EN ISO 12006-3:2016
Building construction — Organization of information about construction works Part 3: Framework for object-oriented information
UK Earthing & Bonding Design Reference
UK Earthing & Bonding Design Reference (Edition 2025 – aligned with BS 7671:2018+A2:2022, Amendment 3 (2024), and draft Amendment 4 (2026), also drawing from official UK Power Networks standards) Scope,
data template
schema providing a data structure used to describe the properties of objects NOTE The relevant scope of the data template should be used together with the term “data template”. E.g.
Facility Data
The non-graphical information attached to objects in the Model that defines various characteristics of the object. Facility Data can include properties such as parametric values that drive physical sizes, material
Appointing Party context of information exchange
ELI5-S2: BIM in Practice E4: Appointing Party context of information exchange Understanding the Appointing Party (T0) Context of Information Exchange in BIM Welcome to the fourth installment of our ELI5-S2
Fixed Equipment
Equipment designed to be fastened to a support or other wise secured in a specific location.
Model View Definition (MVD)
One or more specific information exchange requirements may necessitate the need for a model view definition (MVD). A machine-readable representation of MVDs is required when using them in software development.
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
BS ISO IEC 33020:2019
Information technology—Process assessment Process measurement framework for assessment of process capability
Digital Handover, O&M Records, and ISO 19650 Compliance
Here is a review and summary of digital handover requirements, O&M record management, and ISO 19650 application as outlined in CIBSE Guide M8 (2023) and Regulation 38, with new recommendations
BS EN ISO 21597-1:2020
Information container for linked document delivery — Exchange specification Part 1: Container
Restricted and Highly Restricted information
Info Below you can find a couple of sample notes intended to be copied and pasted to a transmittal when sharing Restricted and Highly Restricted information. Restricted Information This transmittal
PAS1192-2_2015
The Publicly Available Specification (PAS) 1192 part two was published in February 2013; the specification was based on existing Code of practice BS 1192 dated 2007 amended in October 2015
Basic protection
Protection against electric shock under fault-free conditions;use of barriers,placing out of reach,and so forth.
Building Research Establishment Environmental Assessment Method (BREEAM)
It is a UK green building certification system, launched in 1990 by the Building Research Establishment (BRE), similar to LEED. Both systems confirm the level of the sustainability performance of
Project Information Model (PIM)
It is a term introduced in PAS 1192‑2: 2013 and ISO 19650 set of standards. It means any graphical or non-graphical information such as: Structured information, i.e.: schedules, costing and
Digital Plan Of Work (DPoW)
Digital Plan Of Work (DPoW) forms a framework that supports informed and consistent decision making by project teams, at each work stage, helping to deliver agreed and reliable information. The
LTF_Lighting-Fixture Ring
Create unlimited lighting variations with parametric control.
The PD_LTF_Lighting-Fixture_Luminaire-Ring Family is a powerful, fully parametric Revit family that allows users to create limitless lighting fixture configurations.
information delivery milestone
scheduled event for a predefined information exchange [cited from ISO 19650-2:2018(en), 3.1.3.2] Milestones act as signposts through the course of a project. An information delivery milestone is a point in
BS ISO 44001:2017
Collaborative business relationship management systems Requirements and framework
Set-Based Design
Set-Based Design commonly referred to as a set-based design innovation or set-based concurrent engineering. It is a product development approach where teams consider a wide range of design alternatives (a
Gateway (Exclusive)
[XOR] When splitting, directs the sequence flow to one of the outgoing branches. When merging, it waits for one incoming branch to finish before starting the outgoing flow.[1] Symbol
Appointed Party context of information exchange
ELI5-S2: BIM in Practice E6: Appointed Party context of information exchange Understanding the Appointed Party (T2-T4) Context of Information Exchange in BIM Welcome to the final instalment of our ELI5-S2
