Extended data for: Extending Lean from Capital Delivery to Operations in England's Healthcare Estate Management

This deposit contains the underlying data instruments and extended dataset supporting Extending Lean from Capital Delivery to Operations in England's Healthcare Estate Management (Mbabu, Underwood, Munir and Wildenauer), submitted to F1000Research. Files included: Extended Data Spreadsheet (XLSX): NHS ERIC longitudinal backlog and running cost data (2016/17 to 2024/25) with formula-derived analysis; anonymised interview data (I01 to I16) and expert panel data (P01 to P08) with verbatim excerpts; participant profiles; full reference list; and F1000Research data availability statement. Ethics Application Panel Decision (PDF): University of Salford Ethics Committee approval email for Application No. 6674, dated 11 July 2022. Ethics Approval (JPG): Portal screenshot confirming Application ID 6674, Postgraduate Research, Decision: Approved. Extended Data Expert Panel Evaluation (DOCX): Evaluation criteria presented to the expert panel (P01 to P08) covering fruitfulness, prudence, quantification, scope, progressiveness, internal consistency, and external consistency. Extended Data Informed Consent (DOCX): Blank consent form completed by all participants prior to data collection. Extended Data Interview Schedule (DOCX): Semi-structured interview guide used across all sixteen interviews (I01 to I16).