Some of it is perception. At one of the spectrum is junior offshore testers billing by the hour. On the other is McKinsey, who bills by the study. The former

Some of it is perception. At one of the spectrum is junior offshore testers billing by the hour. On the other is McKinsey, who bills by the study. The former gets more rate pressure than the latter. Charging weekly or monthly appears more professional than hourly. (Lawyers are the exception)