Why just-in-case inventory (JIC) matters to a first-time founder
Extra stock can protect sales and production when demand or lead times are uncertain. It also ties up cash, consumes storage and risks damage or obsolescence. Founders need to compare the cost of a shortage with the cost of carrying a buffer rather than assuming more stock is always safer.
Examples of just-in-case inventory (JIC)
A bicycle maker normally uses 100 gear sets a week, while overseas replenishment takes six weeks. Because delays sometimes add two weeks, it holds 200 extra sets as a buffer. The stock supports production during one typical delay, but the company reviews it as demand and supplier reliability change.
Common misunderstanding
JIC is not uncontrolled over-ordering. A deliberate policy estimates disruption risk and sets a justified buffer, whereas excess stock can result from weak forecasting or purchasing. It also differs from just-in-time inventory, which minimises stock by coordinating deliveries closely with actual production or sales needs.
When to use it
Use it for critical items with uncertain supply, volatile demand or severe shortage costs. Set buffers by item using lead-time data, service targets and shelf life, then review them regularly. Avoid broad percentage rules that leave cheap essentials short while expensive, perishable products accumulate unused.