Yes, Cook was the COO during Jobs’ tenure. Before Cook, Apple’s supply chain and manufacturing was a mess—too many of some products and not enough of others.

Yes, Cook was the COO during Jobs’ tenure. Before Cook, Apple’s supply chain and manufacturing was a mess—too many of some products and not enough of others. Back in the day, it was a running joke trying to buy products as an organization—they would announce a new Mac but you couldn’t buy it for 4-6 weeks. It was Tim Cook who implemented Apple’s build to order system after Dell demonstrated its success. We take it for granted now, but it was a huge development at the time.