In certain cases, it is challenging to clearly define the scope, specifications, and implementation plans for an engagement from the start. For such projects, it’s often difficult to estimate efforts for all elements and stages right at the beginning.

In these situations, billing is based on resource utilization. Each resource is assigned a specific rate, determined by factors such as experience, skills, and role in the project. The effort is billed at this pre-agreed rate (hourly, weekly, monthly) until the entire project is delivered.