Abstract
This paper reports the results of an analysis of indicators describing the effectiveness of
actions taken and repairs made by the maintenance services in a food industry company
which had implemented a new manufacturing execution system (MES) 10 months prior to
the study. The application of the above effectiveness indicators plays a significant role in
the rationalization of functioning of maintenance services. Therefore, it is vital that they are
calculated correctly and interpreted in a way that has a positive effect on the organization
of maintenance works. The paper investigates four effectiveness indicators employed by the
maintenance services of the company in question, i.e., mean time to failure (MTTF), mean
time between failures (MTBF), mean time to repair (MTTR) and overall equipment effectiveness
(OEE). The objective of the analysis was to verify the correctness of determination
of the above indicators in the analysed company. In addition, the study was to determine
whether the use of correctly determined indicators and results interpretation could lead to
a higher effectiveness of the actions taken by the maintenance services department. Moreover,
the paper presents a diagnosis of problems connected with incorrect determination and
visualization of the above-mentioned indicators in the analysed company.
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