1. Introduction
Nurse staffing is an actual problem and challenge in many
countries, and nursing workload (NWL), nursing intensity
(NI), and unattended patients’ needs are organizational factors
that significantly affect the quality of care and patient
outcomes [1–3]. One prerequisite for the sustainable development
of a health care system is the optimal allocation of care
resources, in both quantity (number of nurses) and quality
(competence; [4]).Thus, it is of crucial importance for health
care outcomes that nurse managers be able to precisely staff
units and systematically steer total NWL.
Patient classification systems (PCS), also known as
patient acuity or nursing demands systems, have been developed
to manage workloads and estimate the need for nursing