Which of the following tools can be used to communicate performance data in time sequence?

A control chart is a fundamental tool in statistical process control (SPC) specifically designed to monitor process performance over time. It plots data points in a time-ordered sequence, allowing for the analysis of trends, patterns, and process stability. The chart includes a center line representing the process average and upper and lower control limits. By plotting data chronologically, it helps distinguish between common cause variation (inherent to the process) and special cause variation (indicating a specific, identifiable problem), making it the ideal tool for communicating performance data in a time sequence.

A. Scatter diagram: This tool is used to analyze the relationship and correlation between two different variables, not to track a single performance metric over time.

B. Pareto chart: This chart ranks causes or problems by their frequency or impact in descending order, helping to prioritize issues, but it does not display data chronologically.

D. Flowchart: This is a diagram that visually represents the sequence of steps in a process or workflow; it does not plot or communicate numerical performance data.

1. Montgomery

D. C. (2020). Introduction to Statistical Quality Control (8th ed.). John Wiley & Sons.

Page 1: "The control chart is a graphical display of a quality characteristic that has been measured or computed from a sample versus the sample number or time. The chart contains a center line that represents the average value of the quality characteristic... Two other horizontal lines

called the upper control limit (UCL) and the lower control limit (LCL)

are also shown on the chart. These control limits are chosen so that if the process is in control

nearly all of the sample points will fall between them."

2. American Society for Quality (ASQ). (n.d.). Quality Tools A to Z: Control Chart. ASQ.org.

Definition Section: "The control chart is a graph used to study how a process changes over time. Data are plotted in time order."

3. Besterfield

D. H. (2013). Quality Control (8th ed.). Pearson Education

Inc.

Chapter 5

Section "Introduction

" p. 121: "A control chart is a graphic comparison of process performance data to computed 'control limits' drawn as limit lines on the chart... The data are plotted on the control chart in a time sequence."