Is 'As Figure 6.6 shows, the safety stock needed to achieve a given customer service level is proportional to the standard deviation of the demand forecast.' a clear rebuttal of the premise 'Figure 6.6 shows the safety stock needed to achieve a given customer service level.'
As Figure 6.6 shows, the safety stock needed to achieve a given customer service level is proportional to the standard deviation of the demand forecast.###Figure 6.6 shows the safety stock needed to achieve a given customer service level.