Compare and contrast electronic data processing (EDP) systems used by Trinity Industries with those in the marketplace. Using substantive testing, audit the transaction flow and determine whether financial information is accurately reflected in the system transactions. This will allow for an assessment and recommendation as to the effectiveness of the company's internal control processes, including changes in transaction processing if necessary. Compose a short memorandum that communicates the results of the first year of testing along with recommendations as to what Trinity should do differently in subsequent years, including recommendations for reducing SOX-related expenses.

III. Bottom-Up Approach

Question 1d) Which approach is more appropriate in completing a compliance project successfully for Trinity's first year?