By the mid-1990s, the building expanded into a superstore, and the number of employees increased each year. With the help of a friend,Roberts also installed an automated computer system to help make operations more effective and efficient, in addition to reducing the amount of paper used. Revenue increased sharply during the four years after the implementation of the computer system. In spite of this, Roberts had some questions about the processes, as many of the subsidiary accounts did not match up with the general ledger. This didn't prove to be a materiel problem,however,until 2001, when the computers began listing supplies in the inventory account that were actually not on the shelves. This created problem as customers became frustrated by stock-outs. Roberts knew something was wrong, but he couldn't put his finger on it.