The phrase "outdated model" means something that is no longer useful or effective because it is based on old or old-fashioned ideas or methods. Full definition
There's no need for us to follow outdated models if they don't make sense for us anymore. (flexjobs.com)
He said that creating affordable housing opportunities is preferable to outdated models such as large institutions, concentrated low - income housing, and government owned and operated housing. (remonline.com)
Having failed, Jeroen Dijsselbloem, the austere president of the eurozone's finance ministers, was quick to discredit the IMF, accusing the Fund of using outdated models of Greece's public finances. (telegraph.co.uk)