Apart from performing the functions mentioned above, the marketing department also interconnects with other departments such as finance, research and development, and production. Considering the interconnection between marketing and production department, marketing formulates the sales budget, in essence, setting the target for unit sales or units to be produced by the production department. The marketing department also plays a critical function in research and development by providing crucial advice on customer needs and how to make a product marketable. Concerning the interconnection with the finance function, the marketing department must work closely with finance to ensure that there are enough resources for promotion, marketing research, and distribution. The marketing department must also collaborate with the human resource function to ensure the hiring of appropriate staff and on tasks such as training and development.