The productivity per worker has steadily declined in recent years in a manufacturing company. Low motivation among the workers were the main reason for the declined in productivity and it was revealed through an online survey. Following the outcome of the survey and thorough study and planning by the management, they decided to apply Maslow's hierarchy of needs models to identify and satisfy the needs of workers at various levels.

Question: Customer orders fulfilment begins with processing orders and ends with delivering goods timely, efficiently and effectively to the customers. It is a crucial factor to the customer satisfaction. Describe 4 E-commerce fulfilment models with 1 advantage and 1 disadvantage for each model. (16 marks)