1. fixed fee: the service provider and the customer reach an agreement in advance to stipulate a fixed fee amount, which will remain unchanged regardless of the actual workload and time investment of the project.
2. Time charging: the service provider charges according to the time spent by the project team. According to the working hours and rates of team members, they can be charged by hours, days and months.
3. Result-oriented charging: In this mode, the service provider charges according to the delivery results in the project planning stage. For example, according to the provided project planning documents, requirements specifications, system design and other results to charge.