Consultancy is the process of advising companies (clients) on the practices that will improve performance, increase efficiency, save money or generate money within their business; consultants produce plans after a review of operations and strategy and are then responsible for implementing these proposals and training employees accordingly. There are many different kinds of consultancy, from Management to HR and IT to Strategy. Within each subsector there are different industry practices, but all have a similar overall goal: to add value to a client’s business in response to a specific brief. The largest consultancy firms are household names such as KPMG, Deloitte and PWC. There are also many smaller, niche firms that take advantage of providing a targeted offering to their clients.