Ma'anar ƙamus na kalmar "ƙididdigar zama" tana nufin adadin wurin zama, raka'a, ko sarari waɗanda masu haya, abokan ciniki, ko baƙi ke mamaye su a halin yanzu. Ma'auni ne da aka saba amfani da shi a cikin masana'antar baƙunci da masana'antu don tantance amfani da ribar dukiya. Ana ƙididdige ƙimar zama ta hanyar rarraba adadin waɗanda aka mamaye da jimillar adadin raka'a, sannan a ninka sakamakon da 100 don bayyana shi a matsayin kashi.