Normal or random variations that are considered part of operating the system at its current capability are : a. systemic variations. b. special cause variations. c. common cause variations. d. life cycle variations

Normal or random variations that are considered part of operating the system at its current capability are c. common cause variations.

Explanation:

Common cause variation is fluctuation caused by unknown factors resulting in a steady but random distribution of output around the average of the data.

Common-cause variation is the natural or expected variation in a process.

Common-cause variation is characterised by:

It is a measure of the process potential, or how well the process can perform when special cause variation removed.

Common cause variation arises from external sources that are not inherent in the process and is where statistical quality control methods are most useful.

Statistical process control charts are used when trying to monitor and control 5- and 6-sigma quality levels.

a study funded by private corporations refuting global warming

c a goverment agency or homeowner