Stock is any item stored by a business for use in production or sales. Stock can be:
Holding stock incurs warehouse storage costs and ties up working capital. Funds must be found to pay for materials, components and unsold goods with interest.
Running out of one item of stock could bring the whole factory to a halt. Staff must still be paid even though they do not have the parts to carry on production.
Stock control aims to hold sufficient items on site to enable production while minimising stock holding costs.