5-1: A manufacturing company hired a consultancy firm that helped them identify various bottlenecks as well as to automate a couple of associated processes. Among others, the consultants suggested that they enter into a Vendor Managed Inventory (VMI) contract with a major supplier of raw materials used in the manufacturing process. And, the consultants also suggested the company to automate the online billing and payment processing system for orders shipped within the continental USA. What are the theories and methods that are likely to have helped the consultants identify bottlenecks? Total Quality Management Theory of Constraints Value Stream Mapping B and C are correct