From Longman Business Dictionary
rethinkre·think /ˌriːˈθɪŋk/ verb (past tensepst and past participlepp rethought /-ˈθɔːt-ˈθɒːt/) [intransitiveI, transitiveT] to consider a plan or idea again carefully because it might need to be changedIf things get worse, the company may have to rethink itsstrategy.
—rethink /ˈriːθɪŋk/ noun [countableC]a complete rethink of the company’s product line