Project Based: Fixed bid engagements are suitable for short-term projects because they require a specific project scope and comprehensive release roadmap, decreasing the possibility of running over budget.
Time Based: This model fits well for criteria that are high-level and poorly defined. You get full scope and expenditure flexibility with T&M, and you just pay for the services you need.
Team Based: If you really need to easily scale up your internal capital, this is the model to use. You will easily pull in experienced or highly skilled expertise while spending a lot of money on recruiting this way