Slow-Moving and Obsolete Inventory: Spotting and Managing It Before It Becomes a Write-Off

Slow-moving and obsolete inventory is usually noticed when it is already too late: at the annual stocktake or at account closing, and then the only options are heavy discounting or write-off. Yet this stock formed months earlier with clear signs: falling consumption, a product change, or an order that came in above need.

The first step is a clear definition. Define 'slow-moving' by coverage, that is current stock divided by average monthly consumption: for example more than twelve months of cover. 'Obsolete' items are those with no future usage: a discontinued product, a part for old models, or goods close to expiry. The two groups need different solutions, so report them separately.

Early-warning indicators beat year-end ones. An item whose cover rises for three consecutive months, last consumption more than six months ago, an item bought by only one customer who has left, or a product specification change that leaves a part with no use. Turn these signals into a simple monthly report that lists only suspect items, not the whole warehouse.

For each suspect item, have a predefined decision rule. Paths: stop ordering, return to the supplier (if the contract allows), sell at a discount in another channel, rework or exchange for internal use, donate, or scrap. A simple rule such as 'any item with more than 18 months of cover is reviewed in the monthly S&OP meeting with a proposed action' prevents items from being abandoned.

Coordinate the accounting side with finance from the start. An inventory write-down provision, if recorded in good time, spreads its impact over several periods, but if faced all at once at year-end it hits profit as a large shock. Early visibility both improves operational decisions and reduces financial surprises.

A common mistake is focusing on cure rather than prevention. If the root cause (an optimistic forecast, a large MOQ, an order for a project that was cancelled) is not removed, the same kinds of items recur next year. For each significant case, record the cause and see which ordering rule or approval step needs to change.

Another mistake is holding items in hope of future demand with no time limit. Holding always costs: space, capital, obsolescence risk. An explicit rule for 'how long we wait' helps final decisions. And an early discounted sale often recovers more value than a late write-off.

A practical starting point: compile the list of the 20 items with the most stranded capital and set a decision, an owner and a deadline for each. Update this list in the monthly S&OP meeting. This short list usually contains most of the releasable capital.