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Insights from Lunos HQ - A deep dive into accounts receivables and beyond
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Collection Effectiveness Index (CEI): How to Calculate + Improve
The Collection Effectiveness Index (CEI) is a measure of how much of the total receivables available during a period (both past-due balances and new billings) you actually collect. It tracks real collection success, not just speed. In this guide, I'll walk you through what CEI really measures, how to calculate it, and seven practical strategies to improve it.

Average Days Delinquent (ADD): How To Calculate + Improve
Average Days Delinquent (ADD) focuses solely on late payments, showing the average number of days past due for unpaid invoices. That clarity helps teams pinpoint real problems and take action. In this guide, we’ll explain what average days delinquent is and how to calculate it. We’ll also share 7 practical ways to reduce it, including using an AI assistant to handle collections conversations and ease the workload on finance teams.
