During a routine audit of a customer service hotline, an internal auditor noticed that an unusually high number of customer complaints pertained to payments not being applied to the customers' accounts.
Which of the following would most likely be the reason for the high volume of complaints?

Which of the following statements is correct regarding the use of a program evaluation and review technique (PERT) model?
It makes use of a probability model to arrive at a realistic estimate of time
necessary for completion of the audit engagement.
It requires that activities are performed in sequence such that each task is
completed before the commencement of the next activity.
It remains fixed once completed to act as a baseline for measuring the
performance of the audit staff following completion of the engagement.
It begins with the auditor-in-charge identifying the overall scope and then breaking
down the audit engagement into identifiable activity units.

A post-audit questionnaire sent to audit clients is an effective mechanism for:

Insurance companies often receive electronic hospitalization claims directly from hospitals. Which of the following control procedures would be most effective in detecting fraud in such an environment?

Which of the following methods would an auditor most likely use to document a complex sales order process?