We have seen variance in estimates for upgrades from $85,000 to $225,000. There is no difference in scope but do the rates really matter here?
The moral of the story is the firms who do their homework and get a good handle on how much time is required for a task will spend less money and have a better chance of succeeding. Working smarter enables the customer to get more for their money. The more the customer knows about the task , the better, because there are two factors at work the rate and the time to complete.
What is your experience with GRC AC implementations / upgrades? Did you require multiple consultants? Was the project completed in weeks or years?