Assume that you are assigned the task of testing internal controls over financial reporting for the Van Jacobs Corporation year 2011 audit. Van Jacobs Corporation has a December 31 fiscal year end. Due to poor controls that existed previously, Van Jacobs implemented a new internal control system that became operational on February 14th 2011 and did not change throughout the rest of the year.
How much testing would you need to perform on the previous system to issue the 2011 opinion on ICFR? Justify your answer.