External Methodology Assurance Panels (EMAPs)

xternal Methodology Assurance Panels (EMAPs) is a short-life advisory working group comprising subject matter experts and academics to support and facilitate the independent peer review of the proposed statistical methodology for Scotland’s Census 2022. This will support the work outlined in the Statistical Quality Assurance Strategy, published December 2019, and help to support our obligations as producers of National Statistics under the UKSA National Statistics Accreditation process.

When NRS receives the 2022 census data from our supplier the data is passed through many processes which code, clean, adjust and quality assure the data. For each of these steps there is an in-depth statistical methodology designed to set out how each process will be completed. It is this statistical methodology which needs to be peer-reviewed by independent subject matter experts to ensure our approach is fit for purpose to produce high quality outputs at the end of the data journey.

EMAPs meet monthly between May and October 2020, to review the proposed statistical methodology for Scotland’s Census. The group is chaired by one of the external panel members ensuring a fully independent peer review process.

Panel Members

  • Alan Marshall - University of Edinburgh (Chair)
  • Katherine Keenan - University of St. Andrews (Deputy chair)
  • Chris Martin - Ipsos Mori
  • Genevieve Cezard - Centre for Population Change
  • Lisa Rutherford - ScotCen
  • Federico Andreis - University of Stirling
  • Lee Williamson - Scottish Longitudinal Survey

Panel members review and explore each proposed methodology through a discussion facilitated by the panel chair and are asked to reach a consensus on whether the proposed methodology is fit for purpose. A summary report, along with the methodology papers presented for review at EMAPs will be published below following each panel session.

Due to COVID-19 working arrangements the EMAPs group sessions to date have been held online.

EMAPs schedule and publication dates



Papers reviewed

Summary report


Wednesday 27 May 2020

PSR001: Summary Report of the findings of EMAP Session 1 – Wednesday 27 May 2020 (PDF 502KB)


Tuesday 23 June 2020

PSR002: Summary Report of the findings of EMAP Session 2 – Tuesday 23 June 2020 (PDF 514KB)


Wednesday 29 July 2020

PSR003: Summary Report of the findings of EMAP Session 3 - Wednesday 20 July 2020 (PDF 507KB)


Wednesday 26 August 2020

  • PMP010: Census to Census Coverage Survey (CCS) linking
  • PMP011: Remove False Persons (RFP)

    *All papers will be published as soon as possible

PSR004: Summary Report of the findings of EMAP Session 4 - Wednesday 26 August 2020 (PDF 481KB)


Wednesday 23 September 2020

PSR005: Summary Report of the findings of EMAP Session 5 - 23 September 2020 (PDF 538KB)


Thursday 29 October 2020

  • PMP015: Census to census linking and Overcount Correction
  • PMP016: Household Record swapping methodology
  • PMP017: Cell key Perturbation​

​        *All papers will be published as soon as possible

PSR006: Summary Report of the findings of EMAP Session 6 - 29 October 2020 (PDF 490KB)