1. An electronic arrangement ( 101 , 112 , 114 , 116 ), such as a device or a system of multiple devices, for analyzing a flow ( 106 ) of fluid, such as gas or liquid, through a predetermined filter element comprising: a measuring entity ( 114 , 120 , 122 ) configured to obtain indications of the power or energy consumption associated with fluid flow relative to the predetermined filter element at multiple time instants, preferably periodically, during measurement periods, each measurement period occurring between similar subsequent maintenance operations affecting the energy consumption of the filter element, such as cleaning or replacement, wherein the indications for the measurement period are preferably obtained, or at least utilized for modeling, with reference only to the active periods provided as the true operating time of the element and excluding non-operating time potentially occurring between active periods, a modeling entity ( 116 , 120 , 122 ) configured to maintain a regression model constructed based on the indications for measurement periods, said model comprising a response variable and an explanatory variable, wherein the response variable provides an indication of power or energy consumption during a measurement period and the explanatory variable represents said true operating time, and wherein the model regarding the previous measurement period between the second-last maintenance and the last maintenance is taken as a starting point for the model that is updated during the current measurement period since said last maintenance utilizing the indications obtained during the current measurement period, and a scheduling entity ( 118 , 120 , 122 ) configured to determine an optimized timing for the next maintenance operation utilizing the regression model of the current measurement period and information about energy cost and maintenance cost.