van Weele (2014, p. 404 ) suggests that 'supply chain management is at the heart of successful modern retail'. Study pages 404 - 412 in your textbook (va n Weele 2014) for a description of some important concepts on which modern supply chain management in retail is based - vendor managed inventory (VMI), efficient consumer response (ECR), collaborative planning, forecasting and replenishment (CPFR), electronic marketplaces and RFID - and answer the following questions: What is VMI and how does it operate? What are the drawbacks of VMI when not implemented properly? What is ECR and what is it meant to achieve? How does ECR operate? What programs and enabling technologies and concepts are needed to support ECR strategies? (Hint: refer to figure 18.2 in the textbook)