Answer 1

A line chart that indicates upper and lower control limits for desired performance. Plot points beyond the limits are considered unacceptable.

Answer 2

A time-series run chart, with statistically determined upper and lower control limits and a centerline.

Answer 3

A graphic representation of a characteristic of a process, showing plotted values of some statistic gathered from that characteristic, and one or two control limits. [7]

Answer 4

A chart showing how a process is operating over time, with time or successive items or batches as the x-axis. On the y-axis are plotted key measures of the process and the limits (upper and lower control limits) in which the process is expected operate. Applicable to all types of process: manufacturing, transactional and services. Used to highlight out of control behaviour due to special cause variation. See Statistical Process Control.