
Stores with no toilet paper. Colossal cargo ships run aground in the Suez Canal. Factory shutdowns in Vietnam. Ports closed in China. It almost seems that not a day goes by without reports of another supply-chain snafu wrought by the pandemic, which dismantled JIT inventory systems that couldn’t cope with massive, simultaneous disruptions of supply and demand–topics we cover in Chapter 11 and Supp. 11, SCM and SCM Analytics.
Companies have struggled to adapt, with some taking unusual steps. Walmart and Home Depot are chartering their own private cargo vessels so they don’t get caught short as the holiday season approaches, as disruptions from congested ports won’t end anytime soon. The tumult has forced companies to lavish more attention on their SCM professionals, writes Bloomberg Businessweek (Sept.3, 2021). It’s also prompted B schools to refresh their OM/SCM curricula to make sure the next generation of logistics managers are prepared for future crises. “For years, we had sort of taken logistics for granted,” says the dean of Harvard Business School. “The pandemic caused us to rethink it.”
Incoming business students who once defaulted to finance or marketing now want to explore OM/SCM. This academic year more than 400 juniors in Penn State’s undergrad program have declared their intent to major in it, up from 270 the previous year.
Students who pursue OM/SCM degrees this fall are certain to get an earful about the limitations of JIT inventory systems, which grew in popularity during the 1990s. For some companies, though, getting lean became a religion and their undoing when the pandemic hit and there was no surplus stock to be found. Covid-19 exposed the weaknesses of legacy inventory systems, which typically emphasize cost reduction above all else. At Walmart, U.S. inventory rose 20% last quarter as it doesn’t want product shortages come Christmastime. Still, shuttered factories, port congestion, and trucker shortages have brought more chaos to already overtaxed supply chains, raising prices on groceries and jeopardizing the delivery of millions of presents for the holidays.
Classroom discussions may now delve into the downsides of sourcing too much from China or any single country, while they also explore the role that new technologies like machine learning and AI can play in manufacturing and inventory decisions. “Any company that says they fully understand their supply chain is lying,” says one Harvard prof. “The 20th century was about finance. The 21st century should be about supply chains.”



