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DE8: Project Information Requirements (pdf)
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DE8: Project Information Requirements (pdf)

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DE8, part of CIBSE's Digital Engineering Series, is intended for those that specify, commission and use Project Information Requirements (PIRs), which are also known as Plain Language Questions (PLQs). This guidance note is written in reference to PAS 1192-2:2013. A free-to-all template associated with DE8 is available, and is intended to help users put theory into practice.

A PIR document may take any one of a number of forms; there is no prescribed right or wrong way of creating a PIR. The information that is required by an organisation is that which is relevant to the stakeholders in the function of said organisation. This guide is written to cover only those aspects of a PIR that would pertain to the building services and their related systems in terms of a constructed asset. There is no attempt here to provide guidance on more general information requirements for operation of a business or other organisation type.

The PIR document should set out to ask for specific information and data relating to an asset or assets owned or operated by the organisation. This set of requirements will feed into the Employer's Information Requirements (EIR) document. 

The purpose of the PIR is for the employer to ask, in simple and understandable terms, what information is actually required at each stage of the design and construction process.

We have also provided templates that should help with organise Model Review Meetings, which are available here: 

Model Review Meeting Agenda

Model Review Meeting Minutes

The following free-to-all templates are made available alongside the Digital Engineering Series, and can be downloaded here:

Contents of DE8:

  • Standards relating to OIRs
    • PAS 1192-2
    • General principles
  • Use of PIR
    • Who's asking?
    • Actual digital questions
    • Plain language answers
    • Actual digital answers
  • Formulating the questions
    • Formulating questions in plain language
    • Formulating digital questions
  •  Formulating the answers
    • Formulating answers in plain language
    • Formulating digital answers
  • PIR Template


Carl Collins - Consultant to CIBSE


Andrew Krebs - Hoare Lea

Isabelle Smith - Atkins

BEAMA BIM Steering Group

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