Table 1.

Surveys’ dimensions and variables

Dimensions	Variables
Adoption maturity	• Number of years doing Lean • Lean Maturity Assessment • Number of units doing Lean
Strategic implementation approach	• Approach for Lean adoption • Lean leadership commitment index • Central improvement team • External consultant
Operational implementation approach	• Daily management system index • Index support by HR, IT and Finance units • Reward and Recognition • Lean team composition and leadership • Main tools used • Education and training index • Staff Involvement index
Performance	• Self-reported index • Self-reported impact on patients (Improved patient satisfaction scores, Reduced medical errors, Reduced one or more types of hospital-acquired infections, Reduced hospital readmissions within 30 days of discharge, Reduced risk adjusted 30-day mortality, Reduced ambulatory care sensitive admissions) • Self-reported impact on employed and affiliated staff (Improved employee engagement in their work, Reduced employee turnover) • Self-reported impacts on costs (Reduced expenditures in two or more departments, eliminated waste in two or more processes or departments, Reduced average length of stay) • Self-reported impacts on service provision (Increased throughput in the emergency department, Increased throughput in the operating rooms, Increased throughput in the cardiac care unit, Increased throughput in med/surg nursing units)