The data on SPC charts are typically constructed such that they have the most recent data point on the right hand side.

Statistical Process Control (SPC) charts are a specific type of time-series graph. The fundamental convention for plotting time-series data is to represent the passage of time on the horizontal axis (x-axis), moving from left to right. The earliest data points are on the left, and subsequent points are added to the right as they are collected. This chronological arrangement allows for the visual analysis of process performance over time, making the most recently collected data point appear on the far right-hand side of the chart.

B. False: This is incorrect. It contradicts the standard and universal convention for constructing time-series graphs, including SPC charts, where the x-axis represents time progressing from left to right.

1. NIST/SEMATECH. (2012). e-Handbook of Statistical Methods. National Institute of Standards and Technology. Section 6.3.2, "Control Charts." The handbook states, "The control chart is a graph used to study how a process changes over time. Data are plotted in time order." All visual examples in this section (e.g., Figure 6.3.2.1) show the sample number increasing from left to right. Available at: https://www.itl.nist.gov/div898/handbook/pmc/section3/pmc32.htm

2. Montgomery, D. C. (2019). Introduction to Statistical Quality Control (8th ed.). Wiley. In Chapter 5, "Control Charts for Variables," the text describes the construction of a control chart: "The horizontal axis will represent the sample number... The vertical axis will represent the quality characteristic." The accompanying figures (e.g., Figure 5-1) consistently plot sample numbers chronologically from left to right.

3. Oakland, J. S. (2008). Statistical Process Control (6th ed.). Butterworth-Heinemann. Chapter 5, "Charting Methods for Variables," explains that control charts plot sample statistics "in sequence on a chart." The graphical representations throughout the chapter (e.g., Figure 5.2) show the sample number or time on the x-axis, increasing to the right.