dolution

1. Table 1.1 gives the number of units produced by a forestry operation each month during part of 2019 which require rework at certain stages of production because of faults. Rework is additional work required to bring a substandard unit up to standard and is an additional cost one wishes to avoid.

The company wants to establish a p-chart to see whether the process is in control and maintain high quality. What do you conclude? Assuming that z = 3.00, each containing 3747 sample of logs.

(Defects may be: wrong length, damage to the surface, wrong Ty all-end diameter, wrongly classified, too great a degree of “sweep” and knot-holes too large)