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Siedmiokryterialny miernik oceny niepotokowych procesów produkcyjnych

Kukułka A.

Zarządzanie Przedsiębiorstwem

2017

Vol. 20, nr 2

2--6

Growing expectations of clients, who demand products adapted to their individual needs is inducing the development of batch processes. The author developed a model of batch processes rating based on the following criterions: - Economical criterion applies to evaluation of the productions’ cost levels connected with the process subjected to analysis and necessary investment funds. - Ecological criterion is about means of natural environment protection, utilization and segregation of wastes and usage of various media. This criterion is about social responsibility of companies. - Social criterion concerns working conditions (ergonomics on work centers), requirements on personnel qualifications and satisfaction from work - rated for example by measuring absence at work or with survey. - The market criterion is about evaluation if the product or additional services meet clients’ individual needs and if the prices and time between the product beening ordered and delivered to the client are elastic. It is about evaluation of product based on clients’ point of view. - Technological criterion, which concerns implementation of production process course, is based on machines’ work and production workers’ work evaluation. - General development criterion allows the evaluation of a companies’ state not only by measuring fulfilled production processes, but by its general condition as well. - Planning criterion is related to fulfilling general production schedules, which is one of the main targets of production control For each criterion the authors performed selection of indicators, which enable evaluation of the process. Developed conception allows performing complex and synthetic evaluation of batch processes.

Obliczanie składowej jakości OEE przy wielu operacjach technologicznych

Wirkus M., Kukułka A.

Zarządzanie Przedsiębiorstwem

2015

Vol. 18, nr 2

40--47

Aim of this article is to present way of calculation of the OEE rate for work stations. The OEE rate is a tool used in searching for the best way of improvement of functionality of a work station. During the research in X factory, which lead to calculation of OEE rate for certain work station, it was noticed that while producing elements which require multiple technical operations on this single station, the output value of rate is imprecise. The above imprecision results from the rules of calculation of the quality component of the OEE rate, which is calculated as quotient of the number of properly produced elements to entire production on particular station. These rules don’t consider the amount of technical operations performed on specific element properly, before it is considered a defect, also they don’t consider possibility of performing more than one correcting operation, as well as they don’t distinguish operations with different time schedule. As a result of performed analysis a new way of calculating the quality component of OEE rate was developed. Developing new formula for the quality component allows to eliminate earlier mentioned lack of precision, therefore provides a better reflection of actual quality of the machine. This allows to evaluate the best way of improvement. This article presents 3 various formulas, which allow calculating the quality component, depending on type of production and available amount of information. Variety of results, presented by examples, indicate that in many cases the classical formula, which can be found in the literature, can lead to the imprecision of the measurement.