Green-Green Market Ltd is a wholesaler supplying

fresh fruits and vegetables to a number of large retail grocery stores across

South Africa. Since fruits and vegetables are perishables, there is a high

inventory turnover at Green-Green Market Ltd. The following control procedure takes

place in the inventory and production cycle:

Ms Apple, the inventory controller, has

read access to the inventory master file, but no write access.

This control can be categorised as a: