What is industrial statistics? We have a course titled "Industrial Statistics". But I don't understand what is industrial statistics?
What I have understood after searching some sites is only that 

Industrial statistics measure a variety of different characteristics about the mining, manufacturing and energy producing sectors.

Can you please explain?
 A: I agree with Nick Cox, but if you'd like a definition this seems like a useful one:

Industrial Statistics is concerned with maintaining and improving the
quality of goods and services. It involves a broad range of
statistical tools but maintaining and improving quality involves an
overall approach to the management of industrial processes that
transcends the use of these specific tools. Variability is inherent in
all processes, whether they be manufacturing processes or service
processes. This variability must be controlled to create high quality
goods and services and must be reduced to improve quality. Industrial
Statistics focuses on the use of statistical thinking, i.e., the
appreciation of the inherent variability of all processes. It also
focuses on developing skills for modeling data and designing
experiments that can lead to improvements in performance and
reductions in variablity [sic].

$-$ https://math.unm.edu/undergraduate/statistics/industrial-statistics
If you want something pithier, there's this:

..."industrial statistics” refers to the use of statistics to promote
the development, testing, production, and marketing of goods and the
processes that support these efforts.

$-$ David M. Steinberg (2016) Industrial statistics: The challenges and the
research, Quality Engineering, 28(1), 45-59. https://doi.org/10.1080/08982112.2015.1100453
