S: (n) change, alteration, modification (an event that occurs when something passes from one state or phase to another) "the change was intended to increase sales"; "this storm is certainly a change for the worse"; "the neighborhood had undergone few modifications since his last visit years ago"
S: (n) shakedown (initial adjustments to improve the functioning or the efficiency and to bring to a more satisfactory state) "the new industry's economic shakedown"