Materiality and flux analysis

Every step in that table raises the same question: how big does a difference have to be before it matters? That's materialityCloseMaterialityWhether a misstatement or omission would likely change the judgment of a reasonable user of the statements — judged on size and nature together, never a fixed percentage. The tempting answer is a fixed percentage of revenue or net income, and the SEC has explicitly rejected that as a substitute for judgment. A percentage can be a starting point but not the whole call. A small error that turns a loss into a profit, or hides a covenant breach, matters whatever its size.

Flux analysisCloseFlux analysisExplaining period-over-period variances is the last review before sign-off. Every P&L line is compared with what it should have been, and anything that moved past a set threshold gets a sentence of explanation. In a normal month you compare against last month and the budget. Northwind has no last month, so September is read against expectation. Payroll should match the payroll register, rent should match the lease, and cost of revenue should be 54% of sales if the price list holds. If nobody can explain a line, it hasn't been reviewed.