Cash conversion cycle

The operating cycle adds Inventory days and receivable days. The cash conversion cycle subtracts the period supported by ordinary trade payables.

For Aster Year 3:

operating cycle = 113.38 DIO + 54.47 DSO = 167.85 days
cash conversion cycle = 167.85 − 68.65 DPO = 99.20 days

When goods are purchased on credit, the company can hold and sell them while the supplier invoice remains unpaid. DIO plus DSO counts the gross interval from holding Inventory through collecting the customer; DPO approximates the part of that interval before the company's cash leaves to settle the supplier claim. Subtracting DPO leaves the estimated self-financed interval. The negative sign does not make Accounts Payable a negative operating activity.

Attribute arithmetic before cause

Aster's cycle lengthens over the packet while Birchline's shortens. The calculation can attribute the movement to Inventory, receivable, and payable days. It cannot explain why those components moved. That requires demand, stockout, aging, terms, write-off, purchase, supplier, payment, and seasonality evidence.

A shorter cycle can release working capital, but it is not always better. It can result from stockouts, constrained customer credit, lost supplier discounts, delayed payment, or a change in business model. For example, a retailer that receives customer cash at sale but settles ordinary supplier invoices later can have a negative cycle. That timing pattern is not automatically a defect or a guarantee of liquidity. The present module confines its calculations to two wholesalers with positive cycles; cross-business-model evaluation remains outside its evidence packet.

Use as a bridge, not a cash forecast

The cycle links accrual statement flows and average balances. It does not specify the dates or amounts of future receipts and payments. A cash budget or forecast needs invoice schedules, terms, seasonality, commitments, financing, and scenarios.

Boundary

This module uses positive annual flows, continuous ordinary operations, exact credit sales and credit purchases, simple averages, and one 365-day convention. Supplier finance, factoring, manufacturing stages, services without Inventory, negative or zero denominators, acquisitions, interim seasonality, and forecast applications require different inputs or models.