"Assess the quality of this company's revenue growth" is a deceptively open-ended prompt — there's no single formula to plug numbers into, which is exactly why it separates candidates who have a structured process from those who don't. Here's a repeatable approach for handling it in an interview.

Step 1: State What You're Looking For, Before You Look at the Numbers

Before diving into any figures, say out loud what you're checking for. Interviewers are listening for a structured thought process, not just a correct final number. A strong opening sounds like: "I want to check whether the reported revenue growth is backed by cash collection, and whether any of it comes from one-time or non-recurring recognition — like channel stuffing or bill-and-hold sales — rather than genuine, sustainable demand."

Step 2: Check the Cash Collection Signal First — DSO

Days Sales Outstanding is the fastest sanity check available, because it only needs two numbers you'll almost always be given: Accounts Receivable and Revenue.

DSO = (Accounts Receivable / Revenue) × 365

Calculate it for the current and prior period. A sharp, unexplained increase — say, 30 or more days — tells you the company is recognizing revenue faster than it's collecting cash on it. That's your cue to look for the underlying cause in the next step, rather than accepting the headline growth rate at face value.

Step 3: Identify Specific Red-Flag Items

If the case gives you line items — like a chunk of revenue tied to bill-and-hold arrangements, or an unusual spike in shipments to distributors right before quarter-end — call them out explicitly and explain why each one is a red flag:

  • Channel stuffing: shipments concentrated at the reporting deadline, paired with generous return rights — inventory sitting with a distributor isn't the same as a sale to an end customer.
  • Bill-and-hold: revenue recognized on goods that haven't actually shipped — check whether the "transfer of control" criteria are genuinely met.

Step 4: Build the Quality-Adjusted Number

Strip the red-flag items out of reported revenue and recompute the growth rate:

Quality-Adjusted Revenue = Reported Revenue − Bill-and-Hold Revenue − Channel Stuffing Revenue

Then compare the adjusted growth rate to the reported one. The gap between the two is your headline finding — and it's the number you'd actually want feeding into a DCF, comps analysis, or acquisition model, not the reported figure.

Step 5: Connect It to the "So What"

Strong candidates close the loop: what does this mean for valuation, or for a potential acquirer? A lower, quality-adjusted growth rate typically means a lower multiple an acquirer should be willing to pay, and it may be worth flagging the same adjustment for EBITDA and margins, not just revenue.

To see this entire process worked through with real numbers — a full given-data table, the DSO calculation, and the quality-adjusted revenue build — go through the Revenue Quality Assessment case study and try answering it out loud before revealing the model answer.

This kind of "adjust the reported figure to find the real number" thinking also shows up in EBITDA normalization and unlevered free cash flow questions — worth practicing together since interviewers often chain them in the same round.