In this model, we charge client on basis of time spent by our resources and pre-approved additional expenses incurred for the project.
This model is suitable for projects where specifications have not yet been clearly defined at the beginning of the project. In this model, we offer our client the flexibility to change specifications while the project is in progress.
In cases where rough requirement specifications are available, we provide ballpark effort estimates, project timeline, material/resource estimates. This helps our clients in budgeting and deciding on the financials.