Overstock is the early warning for dead stock
A slow mover is not yet dead, which is why it is worth catching. It still sells, just slowly enough that the holding cost outweighs the return. Left alone, seasonal and over-ordered lines drift from slow to dead. Catch them at the slow stage and
you can still act while the stock has value.
Why velocity has to be measured across stores
A single store's velocity is misleading for a group. The same SKU can be a healthy seller in one location and a stalled overstock in another. Measured only per store, the stalled copy looks like normal range. Measured across the group, the imbalance is obvious and the fix is often a transfer, not a markdown.
Turn it into an action list
Rank slow movers by the cash they hold, not by how many there are. The top of that list is where a markdown, a bundle, a supplier return, or an inter-store transfer frees the most capital for the least effort.