The purpose of this paper is to prove some coincidence and common fixed point theorems for ordered Prešić-Reich type contractions in ordered metric spaces. Results of this paper generalize and extend several known results from metric spaces into product spaces when the underlying space is an ordered metric space. An example illustrates the case when new results can be applied while old ones cannot.
Previous research shows that organizational factors influence quality improvement programs, and when there is a fit, it is leading to better business performances. Accordingly, the purpose of this paper is an analysis of interdependence between organizational culture and quality improvement via testing the differences between dimensions and types of organizational cultures and applied procedures for quality improvement techniques on companies from 32 countries worldwide. Following detailed exploration of the available literature, data collection is conducted on 200 production enterprises in multinational supply chain. Upon this, further statistical examination is conducted by comparison of the companies in dependence of its locations -continents. Results show that there are significant differences on dimensions of organizational culture and applied quality improvement procedures depending of geographical location of companies. Accordingly, results of this paper prove that contextual approach promoted in ISO 9001:2015 has to be applied and organizations that operate in different countries and continents must decide how much to localize their organizational culture and related management practices to fit within the host country context.
BACKGROUND: Previous research has shown that the collection and analysis of crane operators’ anthropometric characteristics is very important for operators’ comfort, health and working ability and also from the aspect of performance, productivity and safety. OBJECTIVE: The first aim of this survey is to collect up-to-date anthropometric data of crane operators in Serbia and to collect those data for the first time in Libya. The second aim of this survey is to compare the collected data. The third aim is to model the interior space necessary to accommodate operators in the cabins they operate in Serbia and Libya. METHODS: Standing height, sitting height, lower leg length, upper leg length, shoulder width, hip breadth, arm length, foot length and weight data were collected of 83 Serbian and 50 Libyan crane operators. Descriptive statistics, correlation analysis and tests for differences between variables were conducted to examine differences between Serbian and Libyan crane operators and enable further modeling. The modeling of the cabin interior was done using both univariate and multivariate operators’ models from both samples. RESULTS: There are only four common correlations between variables for both samples. The only measurement without statistical differences is shoulder width. Serbian crane operators have statistically higher values of almost all measurements in comparison to Libyans. The minimal cabin interior space dimensions are 1207×1080×1884 mm for Serbian operators and 1106×1040×1790 mm for Libyan operators when using univariate approach, while multivariate approach provides more precise and comfortable accommodation within 1327×1123×1926 mm for Serbian operators and 1203×1090×1830 mm for Libyan operators. Accordingly, our survey shows that percentile models include less than the intended population proportion in the design problem with few dimensions and depends on correlations among them. CONCLUSIONS: A number of problems are solved through modeling the crane operator workspace and it has been shown that cabins with different dimensions have to be offered to Serbian and Libyan markets.
Procedures in the development process of crane cabins are arbitrary and subjective. Since approximately 42% of incidents in the construction industry are linked to them, there is a need to collect fresh anthropometric data and provide additional recommendations for design. In this paper, dimensioning of the crane cabin interior space was carried out using a sample of 64 crane operators' anthropometric measurements, in the Republic of Serbia, by measuring workspace with 10 parameters using nine measured anthropometric data from each crane operator. This paper applies experiments run via full factorial designs using a combined traditional and Taguchi approach. The experiments indicated which design parameters are influenced by which anthropometric measurements and to what degree. The results are expected to be of use for crane cabin designers and should assist them to design a cabin that may lead to less strenuous sitting postures and fatigue for operators, thus improving safety and accident prevention.
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