Abstract
To improve the ergonomic reliability of medical equipment design during the operation process, a method for evaluating the operating procedure of a medical equipment interface according to functional resonance analysis method (FRAM)-Moran’s I and cognitive reliability and error analysis method (CREAM) is proposed in this study. The novelty of this research is to analyze the ergonomic reliability of medical equipment in a more systematic manner and to minimize the impact of human subjectivity and individual differences on the evaluation results of the operation process. To solve the calculation problem of functional resonance in FRAM and to make the evaluation results more objective, Moran’s I was introduced to quantify the deviation degree caused by the individual differences of the subjects. By giving weights based on Moran’s I, the influence of individual differences and subjectivity on the evaluation results can be minimized, to a certain extent. Considering the importance of a special environment, which is not fully considered by the conventional CREAM, the weighting values based on Moran’s I, Delphi survey, and technique for order preference by similarity to an ideal solution (TOPSIS) were adopted to assign weights to common performance conditions (CPCs) in CREAM. The optimal design scheme was selected more objectively than in the conventional method. The validity and practicability of this operation process evaluation method was verified by a statistical method based on ergonomic reliability experiments.
Highlights
There are many methods used to evaluate ergonomic reliability
Ergonomic reliability is commonly applied in the medical field, and a study by Carayon et al indicated that human reliability analysis (HRA) would play a central role in medical security [2]
These studies indicate that reliability analysis is not limited to traditional mechanical field applications, such as the stress testing of mechanical structures etc. [6,7,8]; reliability analysis is widely used in the medical field, nowadays, some reliability analysis methods applied in this field are immature
Summary
There are many methods used to evaluate ergonomic reliability. The first-generation research methods that focused on human behavior and classification of errors have appeared and developed into the second-generation methods seen later, such as cognitive reliability and error analysis method (CREAM). Zaitseva et al applied the structure function in reliability engineering to analyze and evaluate human factors in the use of medical devices [4]. Compared with different improvement methods, CREAM can be better combined with the environment based on CPC weight allocation, which is combined with other reliability algorithms, such as fault tree analysis (FTA), to solve human factor reliability problems about the source of system errors and targeted change methods. FRAM, as a reliability analysis approach, can provide additional insight into human factors and the environment [31] and is useful in evaluations. According to the situation analyzed above, to evaluate the operation process of medical equipment, this research proposes an approach based on FRAM–Moran’s I and CREAM. 2. Operation Process Evaluation of Medical Equipment Based on Ergonomic Reliability Analysis 2.1. Based upon the global Moran’s I, the weight of an individual’s influence on the entire evaluation can be obtained, as follows: 1−
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