Case studies replenishment

De Toni AF, Zamolo E (2005) From a traditional replenishment system to vendor-managed inventory a case study from the household electrical appliances sector. Int J Prod Econ 96 63-79 Ellinger A, Ellinger A, Keller S (2005) Supervisory coaching in a logistics context Int J Phys Distrib Legist Manage 35(9) 620-636... 

Mini-case study Milo s Home Improvement was recently named as an authorized distributor of lawn tractors by the Dear John Company (DJC— whose advertising proclaims, "You ll love our tractors so much you won t care if she leaves you for someone who s not so attached to lawn care.") Milo s retail network covers the Southeastern United States. You are the newly hired logistics analyst for Milo s, and you ve been asked to evaluate the company s current replenishment policies for optional accessories to support lawn tractors. 

Mini-case study You are the new operations manager for the Northeast regional distribution center (RDC) of office supply retailer StapleMax. The distribution center (DC) you mange is located in Carlisle, PA. You have been asked by your new boss, the VP of Logistics, to evaluate inventory replenishment options for a set of stock-keeping units (SKUs)... 

In the Procter Gamble case study (Case study 8.2), the advice is to cut down on the number of skus on offer in order to improve replenishment. Is this integration or defeatism ... 

To carry out theoretical studies of oxidation-reduction reactions, it is often of interest to know how kf. in Equation 2.5-6 is affected by the hydrodynamics of the system. A common method for obtaining a rigorous description of the hydrodynamic flow of stirred solution is based on measurements made with a rotating disk electrode (RDE). such as the one illustrated in Figure 25-21a and b. When Ihe disk electrode is rotated rapidly, the flow pattern shown by the arrows in the figure is set up. At the surface of the disk, the liquid moves out horizontally from the center of the de-% icc, which produces an upward axial flow to replenish Ihe displaced liquid. A rigorous treatment of the hydrodynamics is possible in this case and leads to the I.evich equation ... 

Covey and Leussing have subsequently carried out detailed studies of the zinc(IT)-catalyzed decarboxylation of oxaloacetate. Two processes are observed using stopped flow techniques an initial absorbance increase being complete in about 30 s and a subsequent absorbance decrease being complete after 15 to 30 min. T e first process is due to metal ion-promoted keto-enol tautomerism and the second to catalyzed decarboxylation. The subsequent protonation of the zinc pyruvate intermediate is rapid and unobservable. The rate constant for the decarboxylation ofZn(oxac)(.etois 7.42 x 10 s at 25 °Cand I = 0.1 M compared with the rate constant 31 x 10 s previously reported at 37 °C (Table 24). Detailed studies of the copper(II)-promoted decarboxylation have also been published. The reaction scheme in this case is summarized in Scheme 27. The release of CO is biphasic as is also the rate of H uptake in the step where pyruvate is formed. Only about 20% of the oxac in the system undergoes decarboxylation within the first 30 s. The remaining 80% is present as Cu(oxac)e ci which does not decarboxylate. The slow rate of CO2 evolution arises from the decarboxylation of a residual level of Cu(oxac)keio which is replenished by reketonization of Cu(oxac)e o,. For the decarboxylation Cu oxac)keto — CO2+ Cu(pyruvate)enoiate) = 0.17 s at 25 °C and / = 0.1 M so that the copper(II) complex decarboxy-lates some 23 times faster than the zinc complex. 

In other instances, such as the study of metabolites or pharmacokinetics in a subcutaneous location, ultrafiltration may be the method of choice. In this case fluid is readUy replenished, and the amount of the chemicals of interest being removed is small with respect to the entire pool. 

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