Does '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.' neither support nor refute 'Figure 6.6 shows a picture of the demand forecast in relation to the weather forecast.', instead existing independently?
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 a picture of the demand forecast in relation to the weather forecast.