Trinity Industries' first year of compliance with Sarbanes-Oxley (SOX) required an analysis of their internal controls and financial reporting processes. The vice president expected Trinity to have a material weakness. To assess Trinity's success, the summary must: 1) Identify the critical elements that led to Trinity's success in its first year of SOX compliance despite expectations of weaknesses. 2) Define what constitutes a material weakness according to SOX and the PCAOB, and assess potential weaknesses specific to Trinity. 3) Illustrate Trinity's key financial reporting processes in both a narrative and flowchart to identify any gaps in controls.