operating cycle
Picture the rhythm of a small juice bar. It spends cash to buy oranges, turns them into juice, sells the juice, and — if a customer pays on account — waits to collect the money. Then it spends that cash on more oranges and goes round again. The time it takes to travel once around this loop, from spending cash to getting cash back, is the operating cycle.
More precisely, the operating cycle is the average time between buying inventory and finally collecting cash from selling it. For a business that sells on credit it has two stretches: the days inventory sits before being sold, plus the days it then takes to collect from customers (accounts receivable). A grocer who holds stock for 20 days and collects in 10 has a 30-day operating cycle; a whisky distiller that ages its product for years has an operating cycle measured in years. This cycle is also the yardstick behind the words 'current' and 'non-current': assets and liabilities tied to one turn of the cycle are current.
The operating cycle matters because it shows how long cash is tied up in the day-to-day running of the business before it comes back — a longer cycle means more cash locked in inventory and receivables, and a greater need for financing to bridge the gap. It is also why the 'one year' rule for current items has an escape clause: for a few industries (shipbuilding, distilling, construction) the normal cycle exceeds a year, so items still count as current if they fall within that longer cycle.
A furniture maker buys timber and keeps it 45 days before the finished sofa sells, then waits 30 days for the customer to pay. Its operating cycle is 45 + 30 = 75 days — the time its cash is tied up from purchase to collection.
Days in inventory plus days to collect: the loop from cash out to cash back in.
A longer operating cycle is not automatically bad (some industries simply work that way), but it does lock up more cash and is the reason the 'within one year' test for current items can stretch to a longer normal cycle.