The assignment discusses the challenges faced by companies when they hire a smaller firm or local firm for audit purposes. The main issue is that these firms may not have the level of experience required to handle clients with large-scale operations and volume. This can lead to difficulties in completing audits, particularly when dealing with international clients operating in different countries with varying laws and regulations. In contrast, hiring one of the Big 4 firms can simplify the audit process due to their uniform audit methods and documentation across all continents.