Figure 7
The histogram displays the distribution of total service time before improvement, with a normal distribution curve overlaid. The x-axis ranges from 0 to 28, and the y-axis represents frequency. Key data points include LSL at 0, Target at 9.4, and USL at 17. The sample mean is 11.065, with a sample size of 200. The standard deviation overall is 5.54749, and within is 5.37261. Overall capability indices are Pp 0.51, PPL 0.66, PPU 0.36, Ppk 0.36, and Cpm 0.44. Potential (Within) capability indices are Cp 0.53, CPL 0.69, CPU 0.37, and Cpk 0.37. The PPM data shows observed values of 0.00 for PPM < LSL and 125000.00 for PPM > USL, with expected values of 23043.50 and 142342.70 respectively. The total PPM observed is 125000.00, with an expected value of 165386.20. All values are approximated.Process capability analysis of total service time before improvement. Source: Authors' own creation