In addition to the project goals stated in the problem statement, these might include goals for time, cost, quality, market share, etc. This part of the mission statement identifies the primary users and any secondary user groups that should be considered in the design process. These assumptions may be imposed by the client or developed by the design team to help maintain a manageable project scope and guide the design effort. If a client offers assumptions and constraints, it's wise to question them carefully so that you understand why they are necessary and what the client's goals are. If there is no clear rationale for an assumption or constraint, you may want to talk to your client about eliminating it.
Stakeholders are all the groups of people who are affected by a product's success or failure.
These include the end users and anyone who makes buying decisions about the product. Stakeholders can also include people within the client organization, such as the manufacturing operation, service departments, marketing departments, etc. Stakeholders can also include regulatory agencies and community organizations. By listing all the stakeholders, you'll be able to consider the needs of all relevant parties as you develop your design. Be prepared to revise your mission statement as the project progresses.