The fixed time & fixed cost model is a model that guarantees a fixed budget for the project which needs to be completed in the given time frame regardless of the expenses & resources utilized. The main advantage of this model is that it allows the client’s to plan and set an exact budget within the stipulated time frame.

The subscription model is a business model in which a client can pay a recurring price at regular intervals (monthly/quarterly/half-yearly/yearly) based on the client usage for access to a product or service. The usage of the product or service may be personal/individual but non-transferable, or under certain circumstances, for a group of people/students/employees utilizing the features of the product or service. This model is also known as “Software as a Service”.