shake–up 
/ˈʃeɪkˌʌp/ noun
plural shake–ups /ˈʃeɪkˌʌp/ noun [count] : an important change or series of changes in the way a company or other organization is organized or run
▪ There has been a major shake-up in the company. ▪ a management shake-up — see also shake up at 1shake
▪ There has been a major shake-up in the company. ▪ a management shake-up — see also shake up at 1shake
