Billing methods vary widely. Daily and hourly rate consulting allows you the greatest control. It tends to be less expensive than fixed price contract because you assume more risk. The key to keeping expenses down is to use the consultant effectively. The section Getting What You Want shows you how.
Some consultants reduce rates for long engagements.
What You Want Specify the problem, not the solution. Many clients ask for additional computer memory or for a particular kind of software to be created, installed or found. Often, the solution they propose does not fully address the business's needs. Why do I want to use this particular product or method. The answer is a good starting point for the consultant.