Time is always the metric on the horizontal scale of a(n) ___________ Chart.
Time is always the metric on the horizontal scale of a(n) ___________ Chart.
In a Xbar Chart, time is always the metric on the horizontal scale. Xbar Charts are used in statistical process control to monitor the mean of subgroups of a variable over time. Each point on the Xbar Chart represents the average value of a subgroup for a sample taken at a specific point in time, making time the constant metric along the horizontal axis.
A multi-vari chart is a two-axis plot, with time moving on the horizontal, or X axis from left to right, and the process output or response measurement plotted on the Y, or vertical axis.