Sampling and nonsampling risk for substantive procedures Fred Hutchinson is auditing revenue for Urban Homes, a home builder in California. Urban Homes usually has between 450 and 600 home construction projects going at any point in time, for between 300 and 500 customers. Urban Homes recognizes revenue on a percentage-of-completion basis. Fred has to determine the appropriateness of revenue recognition for Urban Homes. Fred has previously tested controls and assessed control risk as moderate.

What possible nonsampling risks exist in this case?