Marketing research is a term that is used to refer to the process of systematically designing, collecting, interpreting, and reporting information. It is used to help marketers solve specific marketing problems, and it is also used to take advantage of market opportunities. Marketing research is used to gather information which are not currently available to the decision makers.
A marketing information system (MIS) refers to a system in which marketing data is formally gathered, stored, analysed and distributed to managers in accordance with their informational needs on a regular basis. A management information system is systematically designed to support marketing decision making.
The difference in production is most likely due to adding a chef, because production increased across the board at each level for both types of rolls. If there was only one chef, one roll would increase and the other would decrease because they could only spend their time on one thing.