Critical dampening problem

After the initial work on asymmetric sulfonated polyphenylene oxide membranes, sulfonated polysulfone was subsequently examined by several research groups. However, the appearance of patents in 1973 and 1977 by Rhone-PoulencM 8S covering asymmetric membranes of sulfonated polysulfones appeared to dampen such research efforts. Also, a basic problem with sulfonated polysulfone was the fact that salt rejections fell rapidly when a critical level of sulfonation was exceeded, but water fluxes were too low until this sulfonation level was exceeded. 

Having the suppfier take the decision on replenishment aims to minimise the impact of demand amplification. This critical problem erodes customer service, loses sales, and increases costs. The ability to dampen demand amplification caused by infrequent, large orders from customers is key to the success of VMl. The smplus capacity and excess finished goods held by suppliers to counteract such variation can then be reduced. 

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