An example of increased productivity that corresponds to a decrease in defective parts. In this case the productivity increase is equal to and opposite to the decrease of defective parts. Here is how you could present the progress of measurements during processing:
UCL and LCL are statistical limits that indicate the space in which we find the so-called background noise, that is when the measurements fall outside these limits, then there is an actual variation in the production process and in this case we have had the improvement between July and August