  Industrial applications of machine learning face unique challenges due to the
nature of raw industry data. Preprocessing and preparing raw industrial data
for machine learning applications is a demanding task that often takes more
time and work than the actual modeling process itself and poses additional
challenges. This paper addresses one of those challenges, specifically, the
challenge of missing values due to sensor unavailability at different
production units of nonlinear production lines. In cases where only a small
proportion of the data is missing, those missing values can often be imputed.
In cases of large proportions of missing data, imputing is often not feasible,
and removing observations containing missing values is often the only option.
This paper presents a technique, that allows to utilize all of the available
data without the need of removing large amounts of observations where data is
only partially available. We do not only discuss the principal idea of the
presented method, but also show different possible implementations that can be
applied depending on the data at hand. Finally, we demonstrate the application
of the presented method with data from a steel production plant.
