Exponentially Weighted Moving Average Control Schemes for Assessing Hospital Organizational Performance

Michele Scagliarini; Mariarosaria Apreda; Ulrich Wienand; Giorgia Valpiani; Nicola Napoli

doi:10.6092/issn.1973-2201/6320

Authors

Michele Scagliarini Alma Mater Studiorum - Università di Bologna
Dipartimento di Scienze statistiche “P. Fortunati”
Mariarosaria Apreda Alma Mater Studiorum - Università di Bologna
Dipartimento di Scienze statistiche “P. Fortunati”
Ulrich Wienand Ospedale Universitario di Ferrara
Research, Innovation, Quality and Accreditation Office
Giorgia Valpiani Ospedale Universitario di Ferrara
Research, Innovation, Quality and Accreditation Office
Nicola Napoli Ospedale Universitario di Ferrara
Performance Analysis and Programming Office

DOI:

https://doi.org/10.6092/issn.1973-2201/6320

Keywords:

Perioperative System Performance, Statistical Process Control, Exponentially Moving Average Control Charts, Organizational Indicator, Healthcare Institutions

Abstract

Exponentially weighted moving average (EWMA) control charts have been successfully used in recent years in several areas of healthcare. Most of these applications have concentrated on the problem of detecting shifts in the mean level of a process. The EWMA chart for monitoring the variability has received, in general, less attention than its counterpart for the mean, although equally important and, to the best of our knowledge, it has never been used in the healthcare framework. In this work, EWMA control charts were applied retrospectively for monitoring the mean and variability of a hospital organizational performance indicator. The aim was to determine whether EWMA control charts can be used as a comprehensive approach for assessing the steady-state behaviour of the process and for early detection of changes indicating either improvement or deterioration in the performance of healthcare organizations. The results showed that the EWMA control schemes generate easy-to-read data displays that reflect process performance allowing a continuous monitoring and prompt detection of changes in process performance. Currently, hospital managers are designing an operating room dashboard which also includes the EWMA control charts.

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Exponentially Weighted Moving Average Control Schemes for Assessing Hospital Organizational Performance

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