Final answer:
The term referring to all individuals or organizations interested in the success of a system or project is 'stakeholders'. This includes users, clients, managers, investors, and anyone else affected by the project.
Step-by-step explanation:
The term that refers to all the people who have an interest in the successful implementation of the system is stakeholders. Stakeholders are individuals or organizations with a stake in a project or business operation. This includes not only the users and customers of the designed object or service but can also encompass the design team, the company hiring the design team, government agencies, and other entities affected by the product.
For instance, stakeholders for a new automobile design could involve the consumers, repair mechanics, the Environmental Protection Agency that oversees emissions, the companies supplying fuel, and the investors in the company producing the automobile.