Statistical process control (SPC) involves using statistical techniques to measure and analyze the variations within a process. With SPC, industrial engineers monitor, control, and, ideally, improve a process through statistical analysis. The four basic steps include measuring the process, eliminating variables within the process to make it consistent, monitoring the process, and, finally, improving the process to make the (usually better) intended product. But it is not the answer to everything. All the SPC does is ensure that the product is being manufactured and designed as intended. Thus, SPC does not tell whether the design is good or bad, just if it’s made according to plan.