Yucesan, OngunAvionics2025-08-052025-08-0520252587-167610.30518/jav.1475257https://doi.org/10.30518/jav.1475257https://search.trdizin.gov.tr/en/yayin/detay/1302416/impact-of-operations-on-a-series-per-reliability-perspectivehttps://hdl.handle.net/20.500.14411/10754The Mean Time Between Failure (MTBF) figures are the average of test durations between failure observations formed into a series. They can be seen to suit classical statistical distributions. An equally possible condition is that they are not stationary as a contradiction to the previous statement. In such worse conditions accepting availability of a concealed statistical property, this paper tries to identify the impact of Bi-sample Differencing and Bi-sample mean manipulations. In other words, operating on reliability observations series to reveal concealed statistical knowledge. Experimentation based on observation over a stationary series as a controlled experiment. As an outcome of experiments, the differencing seems to be alleviating the trend and seasonality to a degree. The bi-sample averaging is observed to be hiding variant conditions.eninfo:eu-repo/semantics/openAccessArticle