3 ms·Its also used in manufacturing, tire date codes for instance are week.year or year.weekby mtreis86 3y agoIts also used in manufacturing, tire date codes for instance are week.year or year.weeketoxin 3y agoAlso used in supermarkets for planning. It's handy to see how much of product was purchased in week 34, spanning back a few years.leetrout 3y agoUsed in all of retail. "Assortment Planning"