alteration

(n) 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
change, modification,
(n) the act of making something different (as e.g. the size of a garment) modification, adjustment,
(n) the act of revising or altering (involving reconsideration and modification)
- it would require a drastic revision of his opinion
revision,

change modification adjustment revision

alterative