2 Users
who are familiar with current system and will use future system
3 Domain experts
who are familiar with problem that software must automate e.g. financial expert if
building a financial package
4 Market researchers
who have conducted surveys to determine future trends and potential customers’ need e.g. software being developed for the mass market and no particular customer
5 Lawyers or auditors
who are familiar with government, safety, or legal requirements e.g. tax expert for payroll package