Figure 12.
The graph presents gross profit measured in billions on the vertical axis against time in months on the horizontal axis, ranging from 1 to 100. Four data series are shown. The base run line fluctuates around the lowest range, ending just above 400 million. The stock control line rises with cyclical peaks and troughs, reaching close to 1 billion. The accuracy control line grows more steadily, ending around 1.5 billion. The combined accuracy plus stock control line shows the highest increase, surpassing 2 billion by month 100. The legend at the bottom identifies the four series as base run, accuracy control, stock control and accuracy plus stock control. The overall trend demonstrates that the combined control strategy yields the highest gross profit, followed by accuracy control, then stock control, with base run performing the lowest.Comparative cumulative gross profit after applying improvement scenarios
Source: Authors’ own work