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Classification and Standardisation
Common Data Environment (CDE)
Digital Twin
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Digital Construction (electrical)

term introduced first in PAS 1192 and updated in ISO 19650 framework, it depicts the process of specifying and delivery of project and asset information

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forms a framework that supports informed and consistent decision making by project teams, at each work stage, helping to deliver agreed and reliable information.

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Exchange Information Requirements (EIR) term introduced by BS EN 19650 replace the PAS 1192 term Employer Information Requirements (EIR) on all projects where BS EN ISO 19650 compliance is required.

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The term introduced by ISO 19650 typically describes the Tier 1 Main Contractor.

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breakdown structure to help plan the production of information

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schedule of information containers and delivery dates, for a specific task team

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An MPDT its old PAS 1192 term, the MPDT defines who produces what, when and to what level of detail.

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part of indicating equipment which visually indicates the zone of origin of a alarm of fire or fault

BS 4422 2005

Zone Indicator in Fire Alarm Systems

The zone indicator is a crucial element in fire alarm systems, particularly in larger buildings or complexes where pinpointing the exact location of a fire or fault is essential for a quick and effective response.


  • Identification of Alarm Origin: The primary function of a zone indicator is to visually display the area or zone where a fire alarm or fault has been triggered. This is especially important in buildings divided into multiple zones or sections.
  • Facilitates Efficient Response: By quickly identifying the origin of the alarm, the zone indicator aids in a more targeted and efficient emergency response, allowing firefighters and safety personnel to reach the affected area promptly.

Design and Operation:

  • Visual Indicators: These usually include lights or LED displays that are activated when an alarm is triggered in a specific zone. The design and colour coding can vary, but the objective is always clear and immediate identification.
  • Integration with Fire Alarm Control Panel: Zone indicators are integrated with the central fire alarm control panel. When a detector in a particular zone is activated, the corresponding indicator on the panel illuminates or displays a message.


  • Wide Range of Buildings: Zone indicators are used in various settings, including commercial buildings, residential complexes, educational institutions, and healthcare facilities.
  • Customization for Specific Needs: The configuration of zone indicators can be tailored to the specific requirements and layout of a building.

In summary, zone indicators play a vital role in fire alarm systems by providing a clear and immediate visual indication of the zone of origin of a fire or fault. This feature enhances safety and efficiency in emergency situations.

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