S/n Process Distribution Square error
1 Mixer  9.5+11 × BETA (0.789, 0.848) 0.000365
2 Hopper 4.5+6 × BETA (1.37, 0.815) 0.000534
3 Extruder 1.5+2 × BETA (1.33, 1.42) 0.000121
4 Vacuum 4.5+WEIB (0.873, 1.9) 0.003243
5 Cooling 3.5+4 × BETA (1.52, 0.678) 0.001297
6 Number of stamps TRIA (1.5, 3.2, 4.5) 0.00112
7 Takeoff 2.5+4 × BETA (0.934, 0.903) 0.0001232
8 Balling 9.5+6 × BETA (0.935, 0.836) 0.001245
Table 3: PVC pipe process time distribution in continuous (extrusion).